WO2020174865A1 - Variable-focal-length lens system and imaging device - Google Patents

Abstract

In the present invention, a first lens unit and a third lens unit are disposed on the same optical axis and constituted from lenses having shapes that are rotationally symmetrical about the optical axis. A first free-form lens and a second free-form lens have the same shape and are disposed as rotated 180 degrees with respect to the optical axis. With the z-axis defined as the optical axis of the first lens unit and the third lens unit, the y-axis defined as an axis perpendicular to the z-axis on an image plane, and the x-axis defined as an axis perpendicular to the y-axis and the z-axis on the image plane, the first free-form lens and the second free-form lens can move in the y-axis direction, the refractive power of the second lens unit is varied by moving the first free-form lens and the second free-form lens in mutually opposite directions, and when the lens positional state is changed from a wide-angle end state having the shortest focal length to a telephoto end state having the longest focal length, the first free-form lens and the second free-form lens are moved in the y-axis direction in accordance with the movement of part of the lens groups constituting the first lens unit and the second lens unit.

Description

Specification

Title of invention: Variable focal length lens system and imaging device

Technical field

The present technology relates to a variable focal length lens system used in a digital video camera, a digital still camera, and the like, and an imaging device using such a variable focal length lens system. In particular, this technology uses a zoom of about 24 to 38 mm (35 mm equivalent), an F number of about 1.8 to 4.0, and a zoom ratio of about 10 to 30 times in the wide-angle end state where the angle of view is widest. Suitable for lenses.

Background technology

[0002] Conventionally, as a recording means in a camera, a subject image formed on an image sensor surface by an image sensor using a photoelectric conversion element such as CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor). There is known a method of recording light by converting the light amount of a subject image into an electric output by each photoelectric conversion element.

[0003] With recent technological advances in microfabrication technology, the speed of central processing unit (CPU) and the integration of storage media have been increased, and large-capacity image data that could not be handled up to that point was created. High-speed processing has become possible. In particular, due to the increased speed of CPU, aberration correction such as distortion and lateral chromatic aberration has come to be performed inside the main body after shooting.

By the way, a conventional zoom lens has a plurality of movable lens groups, and the movable lens groups are moved in the optical axis direction to change the focal length while keeping the image plane position constant. (For example, see Patent Document 1).

The zoom lens described in Patent Document 1 includes, in order from the object side to the image side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a positive lens group. It is composed of a third lens group having a folding power and a fourth lens group having a positive refractive power. In this zoom lens, when changing the focal length, the first lens group and the third lens group are fixed, the second lens group moves in the optical axis direction, \¥02020/174865 2 (:170?2019/050965

The fourth lens group moves in the optical axis direction so as to compensate for the accompanying change in the image plane position.

[0006] On the other hand, a sliding variable focal length lens system is known in which a free-form surface lens having no rotationally symmetric axis is moved in a direction perpendicular to the optical axis to change the angle of view. For example, refer to Patent Document 2). In the variable focal length lens system described in Patent Document 2, four free-form lenses move to perform a zoom operation.

Prior art documents

Patent literature

[0007] Patent Document 1: Japanese Patent Laid-Open No. 4_4 3 3 1 1

Patent Document 2: Japanese Unexamined Patent Application Publication No. 2000-7_44063 Disclosure of Invention

Problems to be Solved by the Invention

[0008] However, the conventional zoom lens has a limit in reducing the total lens length.

[0009] In the variable focal length lens system using the free-form surface lens that has been proposed so far, for example, in the lens system in Patent Document 2, by disposing two free-form surface lenses at two locations, respectively Zooming is performed by separating the compensator part and moving it in different directions.

[0010] However, since there are a large number of free-form surface lenses, and it is difficult to process the free-form surface lenses, it was difficult to obtain stable optical quality including manufacturing. In addition, there is a problem that position control is difficult because they move independently.

Therefore, an object of the variable focal length lens system and the image pickup apparatus of the present technology is to provide a small-sized and high-magnification variable focal length lens system and an image pickup apparatus.

Means for solving the problem

[0012] First, the variable focal length lens system according to the present technology includes a first lens unit composed of at least one lens group in order from the object side to the image side, and a first free-form lens. \¥02020/174865 3 卩 (: 170?2019/050965

A second lens unit composed of a surface lens and a second free-form surface lens, and a third lens unit composed of at least one lens group. The first lens unit and the third lens unit described above are used. The lens unit is composed of lenses that are rotationally symmetric with respect to the optical axis and is arranged on the same optical axis.The first free-form surface lens and the second free-form surface lens have the same shape and The optical axis of the first lens unit and the third lens unit is the axis, and the axis perpendicular to the axis on the image plane is the vertical axis and the axis on the image plane is the vertical axis. When the vertical axis and an axis perpendicular to the axis are the vertical axes, the first free-form surface lens and the second free-form surface lens are movable in the vertical axis direction, and the first free-form surface lens and the second free-form surface lens are movable. By moving the lenses in opposite directions, the refractive power of the second lens unit is variable, and the position of the lens changes from the wide-angle end state with the shortest focal length to the telephoto end state with the longest focal length. At this time, the first free-form surface lens and the second free-form surface lens are moved in the direction of the vertical axis along with the movement of a part of the lens group forming the first lens unit and the third lens unit. It is something that moves.

[0013] As a result, the first free-form surface lens and the second free-form surface lens move in opposite directions to change the combined refractive power of the second lens unit, and at the same time, the first free-form surface lens and the second free-form surface lens. By moving by the same amount in the opposite direction, the aberrations caused by the asymmetrical shape cancel each other out in the two lenses, the first free-form surface lens and the second free-form surface lens.

Secondly, in the variable focal length lens system described above, it is desirable that the following conditional expression (1) is satisfied.

(1) 0 .0 3 <8 2/å <0.3 5

However,

△ 2: ø 27/¢ 2

¢27: Refracting power of the 2nd lens unit in the telephoto end state

0: Refracting power of the second lens unit in the wide-angle end state

å: dried 1: / dried \¥02020/174865 4 (: 170?2019/050965

D 1: Focal length of the entire lens system in the telephoto end state

%: Focal length of the entire lens system in the wide-angle end state

And

[0015] This suppresses chromatic aberration that occurs in the telephoto end state.

Thirdly, in the variable focal length lens system described above, it is desirable that the following conditional expressions (2) and (3) are satisfied.

However,

△ !_ Eight: Amount of movement in the vertical axis direction of the first free-form surface lens from the wide-angle end state to the telephoto end state

△ !_ _: The amount of movement of the second free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state.

D 1: Focal length of the entire lens system in the telephoto end state

And

[0017] With this, a large movement space in the axial direction is not required, and the generation of asymmetric aberration is suppressed.

[0018] Fourth, in the variable focal length lens system described above, it is desirable that the aperture stop be disposed near the second lens unit and satisfy the following conditional expression (4).

However,

△: Maximum length along the axis from the aperture stop to the second lens unit%: The focal length of the entire lens system in the wide-angle end state

And

[0019] As a result, the off-axis light flux passes through a position close to the optical axis.

[0020] Fifth, in the variable focal length lens system described above, it is desirable to satisfy the following conditional expression (5). \\02020/174865 5 ((170?2019/050965

(5) 0. 9 <丨△!_8丨 / 丨△!_ 跳丨 <1.1

However,

△ !_ Eight: Amount of movement in the vertical axis direction of the first free-form surface lens from the wide-angle end state to the telephoto end state

△ !_ _: The amount of movement of the second free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state.

And

[0021] This reduces the amount of movement of the two free-form surface lenses.

[0022] Sixthly, in the above-mentioned variable focal length lens system, the first lens unit has, in order from the object side to the image side, a negative refractive power with the first lens group having a positive refractive power. And a second lens group which has a second lens group, and when the position state of the lens changes from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, and the second lens group It is desirable that at least the second lens unit moves in the optical axis direction so that the distance between the unit and the second lens unit decreases.

As a result, the zooming effect of the first lens unit is increased and the change in the diameter of the aperture stop due to the change in zoom position is suppressed.

Seventh, in the above variable focal length lens system, it is preferable that the third lens unit includes a focusing lens that moves in the optical axis direction according to the subject distance.

[0025] With this, when the lens groups in the first lens unit and the second lens unit have a focusing action, it is possible to prevent the change of the angle of view due to the change of the subject distance. become.

Eighth, an imaging device according to an embodiment of the present technology includes a variable focal length lens system and an imaging element that converts an optical image formed by the variable focal length lens system into an electrical signal, The lens system comprises, in order from the object side to the image side, a first lens unit composed of at least one lens group, a second lens unit composed of a first free-form surface lens and a second free-form surface lens, and A third lens unit composed of at least one lens group, \¥02020/174865 6 卩 (: 170?2019/050965

The unit and the third lens unit are composed of lenses that are rotationally symmetric with respect to the optical axis and are arranged on the same optical axis. They are arranged in the same shape and are rotated 180° with respect to the optical axis. The first free-form surface lens and the second free-form surface lens are movable in the direction of the lower axis, and the first free-form surface lens is movable along the axis. By moving the second free-form surface lens and the second free-form surface lens in opposite directions, the refracting power of the second lens unit can be changed. When the lens position state changes, the first free-form surface lens and the second free-form surface lens and the second lens unit that form part of the third lens unit move. Free-form surface lens moves in the vertical axis direction

[0027] As a result, in the variable focal length lens system, the first free-form surface lens and the second free-form surface lens move in opposite directions, so that the combined refractive power of the second lens unit changes and the first free-form surface becomes Since the lens and the second free-form surface lens are moved in the opposite direction by the same amount, the aberrations caused by the asymmetrical shape cancel each other out by the two lenses, the first free-form surface lens and the second free-form surface lens. Explanation

[0028] [Fig. 1] Fig. 2 to Fig. 17 show an embodiment of a variable focal length lens system and an image pickup apparatus of the present technology. This diagram shows a refractive power arrangement diagram of the variable focal length lens system. Is.

FIG. 2 is a diagram showing a lens configuration of a first example.

[Fig. 3] The spot diaphragm of the first embodiment.

FIG. 4 is a distortion diagram of the first example.

FIG. 5 is a diagram showing a lens configuration of a second example.

FIG. 6 is a spot diaphragm of the second embodiment. \¥02020/174865 7 卩 (: 170?2019/050965

FIG. 7 is a distortion diagram of the second example.

FIG. 8 is a diagram showing a lens configuration of a third example.

FIG. 9 is a spot diaphragm of the third embodiment.

FIG. 10 is a distortion diagram of the third example.

FIG. 11 is a block diagram showing an example of an image pickup apparatus.

FIG. 12 is a diagram schematically showing the overall configuration of an operating room system.

FIG. 13 is a diagram showing a display example of an operation screen on the centralized operation panel.

FIG. 14 is a diagram showing an example of a state of surgery to which an operating room system is applied.

[Fig. 15] Fig. 15 is a block diagram showing an example of the functional configuration of the camera head and XXII shown in Fig. 14.

FIG. 16 is a block diagram showing an example of a schematic configuration of a vehicle control system.

FIG. 17 is an explanatory diagram showing an example of installation positions of the vehicle exterior information detection unit and the imaging unit. MODE FOR CARRYING OUT THE INVENTION

[0029] Hereinafter, modes for implementing the variable focal length lens system and the imaging device of the present technology will be described.

[0030] [Configuration of variable focal length lens system]

The varifocal lens system of this technology consists of a first lens unit consisting of at least one lens group, a first free-form surface lens and a second free-form surface lens in order from the object side to the image side. It consists of a two-lens unit and a third lens unit that is composed of at least one lens group.

[0031] Further, in the variable focal length lens system of the present technology, the first lens unit and the third lens unit are composed of lenses having a rotationally symmetric shape with respect to the optical axis and are arranged on the same optical axis. The first free-form surface lens and the second free-form surface lens have the same shape and are arranged 180° rotated with respect to the optical axis.

[0032] Furthermore, in the variable focal length lens system of the present technology, the optical axes of the first lens unit and the third lens unit are used as the axes, and the axis perpendicular to the axis on the image plane is the vertical axis, and on the image plane. Assuming that the vertical axis and the axis perpendicular to the axis are horizontal axes, the first free-form surface lens and the second free-form surface lens can move in the vertical axis direction. \¥02020/174865 8 卩 (: 170?2019/050965

[0033] In addition, in the variable focal length lens system of the present technology, the first free-form surface lens and the second free-form surface lens move in opposite directions, so that the bending force of the second lens unit is variable. , When the lens position changes from the wide-angle end state with the shortest focal length to the telephoto end state with the longest focal length, part of the lens groups that make up the first lens unit and the third lens unit moves. At the same time, the first free-form surface lens and the second free-form surface lens move in the axial direction.

In a general zoom lens, rotationally symmetric lenses such as spherical lenses and aspherical lenses are used, and at least two movable lens groups are configured to move in the optical axis direction.

[0035] Specifically, one movable lens group moves, and the other lens group moves so as to compensate the change in the image plane position due to the movement.

On the other hand, in the variable focal length lens system disclosed in Japanese Patent Application Laid-Open No. 2000_4_063, etc., four free-form surface lenses are arranged, and all of them are arranged in a direction perpendicular to the optical axis. It was movable. Then, the two free-form lenses arranged on the object side move in opposite directions to each other, thereby changing the refracting power of the entire lens system, and the resulting change in the image plane position is arranged on the image side. The two free-form lenses, which are the same, move in opposite directions to compensate.

[0037] Here, in the present technology, since a rotationally asymmetric lens is used, the XV axis is defined. The optical axes of the first lens unit and the third lens unit, which are composed of rotationally symmetric lenses, are the axes, and the plane perpendicular to the axis on the image plane is the axis and the axis and the axis on the image plane are the axes. With the axis perpendicular to the axis as the main axis, the three axes intersect at the origin on the image plane.

[0038] In the variable focal length lens system of the present technology, the first free-form surface lens and the second free-form surface lens have the same shape and are arranged by rotating 180 degrees about the axis. Then, the combined refracting power of the second lens unit changes as the first free-form surface lens and the second free-form surface lens move in opposite directions. By combining this with a general zoom lens, the total optical length can be shortened while keeping the image plane position constant.

In the conventional zoom lens, the moving direction of each lens group is only the optical axis direction. \¥02020/174865 9 boxes (: 170?2019/050965

In contrast, the variable focal length lens system of the present technology increases the degree of freedom for changing the focal length by moving the two free-form surface lenses in directions other than the optical axis direction.

[0040] In particular, by making the first free-form surface lens and the second free-form surface lens have the same shape, the shape of the free-form surface becomes smooth, and the shift of the stop position and the eccentricity of the free-form surface (lens on the object side and the image side) It has become possible to prevent performance deterioration due to the surfaces collapsing or moving.

[0041] Further, when changing the focal length, by moving the first free-form surface lens and the second free-form surface lens in the opposite directions by the same amount, the aberrations caused by the asymmetrical shape can be eliminated. The two lenses, the second free-form surface lens and the second free-form surface, cancel each other out to achieve good optical performance.

[0042] As described above, the variable focal length lens system of the present technology has various effects, and can provide a small-sized and high-magnification variable focal length lens system.

[0043] In the variable focal length lens system of the present technology, the zooming effect of changing the focal length is caused by the combination of moving the conventional zoom lens and the free-form surface lens.

[0044] At this time, if the refractive power of the free-form surface lens largely changes in accordance with the amount of movement, the effect of changing the focal length becomes large, but it is difficult to suppress the occurrence of chromatic aberration, so that it is possible to obtain a predetermined optical performance. Can't get

Therefore, in the variable focal length lens system of the present technology, it is desirable that the following conditional expression (1) is satisfied.

(1) 0.0 3 <8 2/å <0.3 5

However,

△ 2: ø 27/¢ 2

¢27: Refracting power of the 2nd lens unit in the telephoto end state

0: Refracting power of the second lens unit in the wide-angle end state

å: dried 1: / dried

D 1: Focal length of the entire lens system in the telephoto end state

%: Focal length of the entire lens system in the wide-angle end state \¥0 2020/174865 10 box (: 170?2019/050965

And

Conditional expression (1) is a conditional expression that defines the ratio of the second lens unit to the zoom ratio of the entire lens system.

If the upper limit of conditional expression (1) is exceeded, the chromatic aberration that occurs in the telephoto end state becomes large and the optical performance deteriorates.

On the contrary, when the value goes below the lower limit of the conditional expression (1), downsizing of the conventional zoom lens cannot be achieved sufficiently.

Therefore, by satisfying the conditional expression (1) in the variable focal length lens system, it is possible to suppress the occurrence of chromatic aberration in the telephoto end state to improve the optical performance, and also to reduce the size. be able to.

[0050] In order to further improve the performance of the present technology, it is desirable to set the upper limit of conditional expression (1) to 0.3.

Further, in the present technology, by satisfying the following conditional expressions (2) and (3), it is possible to achieve a balance between miniaturization and high performance.

However,

△ !_ Eight: Amount of movement in the vertical axis direction of the first free-form surface lens from the wide-angle end state to the telephoto end state

△ !_ _: The amount of movement of the second free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state.

D 1: Focal length of the entire lens system in the telephoto end state

And

[0052] Conditional expressions (2) and (3) are conditional expressions that regulate the movement amounts of the first free-form surface lens and the second free-form surface lens. Condition 1 included in Conditional Expressions (2) and (3) sets the focal length of the entire lens system in the wide-angle end state to the maximum zoom ratio in the telephoto end state and the wide-angle end state. When you do, it means that you are %. J% is the focal length in the wide-angle end state, which is the reference \\0 2020/174865 1 1 卩 (: 170?2019/050965

It is included in the meaning of normalizing the equation, and as a result, the conditional expressions (2) and (3) are the movement amounts of the first free-form surface lens and the second free-form surface lens with respect to the zoom ratio. Will be optimized.

If the upper limits of conditional expressions (2) and (3) are exceeded, a large movement space in the vertical axis direction is required, and the lens barrel size becomes large.

If the lower limits of conditional expressions (2) and (3) are exceeded, the shape will change significantly with a small amount of movement, and a large amount of asymmetric aberration will occur.

Therefore, if the variable focal length lens system satisfies the conditional expressions (2) and (3), the moving space in the vertical axis direction of the first free-form surface lens and the second free-form surface lens can be improved. It is possible to reduce the size of the lens barrel and reduce the size of the lens barrel, and it is possible to suppress the occurrence of asymmetrical aberrations due to the movement of the first free-form surface lens and the second free-form surface lens.

In the present technology, in order to further improve the performance, it is preferable that the aperture stop is arranged near the second lens unit and the following conditional expression (4) is satisfied.

However,

△: Maximum value along the axis from the aperture stop to the second lens unit%: The focal length of the entire lens system in the wide-angle end state

And

Since the first free-form surface lens and the second free-form surface lens have different distances from the aperture stop, asymmetric off-axis aberrations are likely to occur. Therefore, by arranging the first free-form surface lens and the second free-form surface lens in the vicinity of the aperture stop, the off-axis light beam passes through a position close to the optical axis, and asymmetric off-axis aberrations can be suppressed.

[0058] In particular, by disposing the second lens unit and the aperture stop so as to satisfy the conditional expression (4), high performance can be achieved.

[0059] In the present technology, in order to reduce the size of the free-form surface lens and the lens system as a whole, it is desirable to set the upper limit of conditional expression (4) to 0.6. .. \¥0 2020/174865 12 (: 170?2019/050965

[0060] In the present technology, it is desirable to satisfy the following conditional expression (5) in order to loosen the stop position accuracy of the two free-form surface lenses and obtain excellent optical performance during manufacturing.

(5) ○ 9.9 <丨△!_ eight 丨 / 丨△!_ 巳丨 <1.1

However,

△ !_ Eight: Amount of movement in the vertical axis direction of the first free-form surface lens from the wide-angle end state to the telephoto end state

△ !_ _: The amount of movement of the second free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state.

And

[0061] In the present technology, since the two free-form lenses have the same shape, if the movement amount ∆! Will end up.

Therefore, when the variable focal length lens system satisfies the conditional expression (5), the moving amounts of the two free-form surface lenses are reduced, and the optical performance can be improved.

[0063] Further, in order to achieve higher optical performance, the upper limit of conditional expression (5) should be 1.

It is desirable to set it to 05 or the lower limit to 0.95.

[0064] In the present technology, in order to further improve performance, the first lens unit has, in order from the object side to the image side, the first lens group having positive refractive power and the negative lens power. The second lens group, and when the lens position state changes from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, and the second lens group and the second lens group It is desirable that at least the second lens unit moves in the optical axis direction so that the distance to the lens unit decreases.

With such a configuration, the zooming action of the first lens unit is increased, and the change in the diameter of the aperture stop due to the change in zoom position is suppressed. As a result, the surface precision of the free-form surface lens required in the wide-angle end state and the telephoto end state is equalized, and stable optical quality can be obtained even during mass production. \\0 2020/174865 13 卩 (: 170?2019/050965

In the present technology, it is desirable that the third lens unit include a focusing lens that moves in the optical axis direction according to the subject distance.

[0067] This is because the first lens unit and the second lens unit have a zooming action. Therefore, when the lens group in these has a focusing action, the focal length of the entire lens system changes, This is because the angle of view changes as the subject distance changes.

[0068] Therefore, when the third lens unit includes the focusing lens, when the lens groups in the first lens unit and the second lens unit have a focusing action, the angle of view depending on the change in the subject distance is increased. It is possible to improve the optical performance by avoiding the change of.

[0069] In each of the embodiments according to the present technology, the aperture stop is arranged on the image side of the second lens unit, but the aperture stop is located on the object side of the second lens unit or the second lens unit. It is also possible to place it between the two free-form lenses that compose it.

[0070] With the variable focal length of the present technology, the shape of the free-form surface is represented by an XV polynomial. The formula that shows the concrete shape is! <A conic coefficient (conic constant), 0 3, 0 4, -, when the 〇 5 3 coefficients, sag 3 ₃ 9 in the axial direction is in Equation 1 below.

[0071] [Number 1]

[0072] In the present technology, since the first free-form surface lens and the second free-form surface lens are moved in the axial direction, the first free-form surface lens and the second free-form surface lens have a symmetrical shape with respect to the flat plane. is there. Specifically, the odd-numbered terms of X mean zero.

[0073] Further, since the first free-form surface lens and the second free-form surface lens are arranged in opposite directions with respect to the axis, the signs of the odd polynomial terms of the polynomials are opposite. \¥02020/174865 14 卩 (: 170?2019/050965

[0074] In the present technology, a mouth-pass filter is arranged on the image side of the lens system to prevent the generation of moire fringes, and an infrared cut filter is arranged according to the spectral sensitivity characteristics of the light receiving element. Of course, it is possible.

[Numerical Example of Variable Focal Length Lens System]

Hereinafter, specific embodiments of the variable focal length lens system of the present technology and numerical examples in which specific numerical values are applied to the embodiments will be described with reference to the drawings and tables.

[0076] FIG. 1 illustrates a refractive power arrangement of a variable focal length lens system according to each embodiment of the present technology. In the variable focal length lens system of this technology, the first lens unit II 1, the second lens unit II 2 and the third lens unit II 3 are arranged in order from the object side to the image side.

The first lens unit II 1 is composed of the first lens group O 1 having a positive refractive power and the second lens group O 2 having a negative refractive power. The second lens unit II 2 is composed of a third lens group 0 3 and a fourth lens group 0 4 which are free-form lenses. The third lens unit II 3 is composed of the fifth lens group ◦ 5, the sixth lens group ◦ 6, the seventh lens group ◦ 7, and the eighth lens group ◦ 8.

[0078] When the focal length state changes from the wide-angle end state in which the focal length is the shortest to the telephoto end state in which the focal length is the longest, the first lens group 0 1 is fixed, and the second lens group 0 2 is along the axis. Moving to the image side, the third lens group ◦ 3 moves in the minor direction in the vertical axis direction, the fourth lens group ◦ 4 moves in the positive direction in the vertical axis direction, and the fifth lens group 0 5 moves in the axial direction. Along the axis, the 6th lens group 0 6 moves to the object side, the 7th lens group 0 7 moves to the object side along the axis, and the 8th lens group ◦ 8 is fixed. To be done.

[0079] Then, the air distance 0 1 between the first lens group 〇 1 and the second lens group ◦ 2 increases, and the air distance 0 2 between the second lens group ◦ 2 and the third lens group ◦ 3 decreases. , The 4th lens group ◦ 4 and the 5th lens group ◦ 5 the air gap port 4 decreases, the 5th lens group ◦ 5 and the 6th lens group ◦ 6 the air gap 0 5 changes, The air gap 6 between the lens group ◦ 6 and the 7th lens group ◦ 7 changed, and the 7th lens group ◦ 7 and the 8th lens group \¥02020/174865 15 卩 (: 170?2019/050965

The air gap 07 with 08 is increased.

The aperture stop 3 is arranged on the image side of the fourth lens group 04, and is fixed in the optical axis direction when the focal length changes.

In each of the embodiments according to the present technology, the image pickup side of the eighth lens group 8 is provided with a rear cover filter, a mouth-pass filter, and a cover glass for an image sensor.

[0082] In each example, the aspherical surface is represented by the following mathematical formula.

[0083] [Numeric 2] z = cH ² y [1 + [1- (1 +0 c ^{^} H ² } ^{1 / 2} ] + eight 1 to 1 ⁴ + Mitsu 1 to ¹⁶ +

㈩ 2 = (> ( _{2 +} ) 1/2)

It should be noted that 1 ^to 1 are distances from the optical axis, 2 is sag amount, ◯ is curvature, 1< is conic coefficient (conical constant), 8, and are aspherical coefficients.

<First Example>

FIG. 2 shows a lens cross-sectional view of a variable focal length lens system 1 according to the first example of the present technology.

[0086] The first lens group ◦ 1 has a cemented lens !_ 1 1 consisting of a negative meniscus lens having a concave surface facing the image side and a positive lens having a convex surface facing the object side, and a convex surface facing the object side. It consists of a meniscus-shaped positive lens !_ 1 2.

The second lens group 02 is a meniscus-shaped negative lens whose convex surface faces the object side!

It consists of 2 1, a cemented lens !_ 2 2 composed of a biconcave lens and a biconvex lens, and a negative lens !_ 2 3 with the concave surface facing the object side.

[0088] The third lens group 0 3 is composed of one first free-form surface lens !_ 3, and the fourth lens group 0 4 is composed of one second free-form surface lens !_ 4. 1 Free-form surface lens !_ 3 and 2nd free-form surface lens !_ 4 are arranged with their axes inverted.

[0089] The fifth lens group 0 5 is a cemented lens of a biconvex positive lens !_ 5 1 and a positive lens with a convex surface facing the object side and a negative lens with a concave surface facing the image side !_ 5 2 It consists of and. \¥02020/174865 16 卩(: 170?2019/050965

[0090] 6th lens group ◦ 6 is a positive biconvex lens! -Composed of 6.

[0091] The seventh lens group ◦ 7 is composed of a negative lens !_ 7 having a concave surface facing the image side.

The eighth lens group 08 is composed of a positive lens !_ 8 having a convex surface directed toward the object side.

In the first example, the movement amounts of the first free-form surface lens !_ 3 and the second free-form surface lens !_ 4 in the vertical axis direction are slightly different. This makes it possible to reduce the size of the variable focal length lens system 1 in the vertical axis direction.

[0094] Tables 1 to 4 below show values of specifications of the first embodiment of the present technology. Table 1 shows the lens data such as the radius of curvature of each lens, Table 2 shows the variable distance and movement amount (zoom displacement amount) when changing the focal length, and Table 3 shows the free-form lens range. The XV free-form surface coefficients (XV polynomial coefficients) that represent the shape, and Table 4 show the aspherical surface coefficients.

[0095] The meanings of the symbols shown in the following tables and explanations are as shown below.

[0096] In Table 1, "radius of curvature" indicates the reciprocal of curvature, "0" in "radius of curvature" indicates a plane, and "mouth 11" between the 1st and +1st surfaces. Shows the axial spacing (the thickness of the center of the lens or the air spacing) that is a variable spacing. The “refractive index” and “Abbe number” are the refractive index and Abbe number at the line (s = 5 87.6 nm). Indicates. In Table 2, “X” and “S” indicate the values in the X-axis direction and the vertical axis direction, respectively, and the “shift amount” is for the first free-form surface lens !_ 3 and the second free-form surface lens 1-4. Indicates the amount of movement in the vertical axis direction.

[0097]

\¥02020/174865 17 卩(: 17 2019/050965

[table 1]

\¥0 2020/174865 18 卩（：17 2019/050965

\¥0 2020/174865 18 卩 (: 17 2019/050965

[0098] [Table 2]

[0099]

\¥0 2020/174865 19 卩(: 17 2019/050965

[Table 3]

[0100]

\¥02020/174865 20 units (: 17 2019/050965

[Table 4]

[0101] Table 5 shows the corresponding values of the conditional expressions in the first embodiment.

[0102]

\¥0 2020/174865 21 卩 (: 170?2019/050965

[Table 5]

[0103] Fig. 3 shows the spot diagram of the first embodiment in the wide-angle end state and the telephoto end state, and Fig. 4 shows the distortion diagram of the first embodiment.

From each aberration diagram, it is apparent that various aberrations are satisfactorily corrected and that this example has excellent imaging performance.

<Second Example>

FIG. 5 shows a lens cross-sectional view of a variable focal length lens system 2 according to the second example of the present technology.

[0106] The first lens group ◦ 1 consists of a cemented lens !_ 1 1 consisting of a negative meniscus lens with a concave surface facing the image side and a positive lens with a convex surface facing the object side, and a convex surface facing the object side. It consists of a meniscus-shaped positive lens !_ 1 2.

[0107] The second lens group 0 2 is a negative meniscus lens whose convex surface faces the object side!

2 1, a cemented lens of a biconcave lens and a biconvex lens !_ 2 2, and a concave surface on the object side. \¥02020/174865 22 卩 (: 170?2019/050965

It is composed of a negative lens 1 to 2 3 facing toward.

[0108] The third lens group 0 3 is composed of one first free-form surface lens !_ 3, and the fourth lens group 0 4 is composed of one second free-form surface lens !_ 4. 1 Free-form surface lens !_ 3 and 2nd free-form surface lens !_ 4 are arranged with their axes inverted.

[0109] The fifth lens group 0 5 is a cemented lens which is a biconvex positive lens !_ 5 1 and a positive lens with a convex surface facing the object side and a negative lens with a concave surface facing the image side !_ 5 2 It consists of and.

[01 10] 6th lens group ◦ 6 is a biconvex positive lens! -Composed of 6.

[01 1 1] The seventh lens group ◦ 7 is composed of a negative lens !_ 7 having a concave surface facing the image side.

[01 12] The eighth lens group ◦ 8 is composed of a positive lens !_ 8 with a convex surface facing the object side.

In the second example, the movement amounts of the first free-form surface lens !_ 3 and the second free-form surface lens !_ 4 in the vertical axis direction are slightly different. This makes it possible to reduce the size of the variable focal length lens system 2 in the vertical axis direction.

[0114] Tables 6 to 9 below show values of specifications of the second embodiment of the present technology. Table 6 shows lens data such as the radius of curvature of each lens, Table 7 shows the variable distance and the amount of movement (zoom displacement) when changing the focal length, and Table 8 shows the free-form surface lens. The XV free-form surface coefficient (XV polynomial coefficient) that represents the shape and Table 9 show the aspherical surface coefficient.

[0115] The meanings of the symbols shown in the following tables and explanations are as shown below.

[01 16] In Table 6, "radius of curvature" indicates the reciprocal of curvature, "0" in "radius of curvature" indicates a plane, and "mouth 11" is between the 1st and +1st surfaces. The axial distance (the thickness of the center of the lens or the air distance), which is the variable distance between the two, is the refractive index and the Abbe number at the line (s = 5 87.6 nm). Indicates a number. In Table 7, “X” and “ ₇ ” indicate the respective values in the X-axis direction and the vertical axis direction, and the “shift amount” is for the first free-form surface lens !_ 3 and the second free-form surface lens 1-4. Indicates the amount of movement in the vertical axis direction. \¥02020/174865 23 卩(: 17 2019/050965

[0117] [Table 6]

[0118] [Table 7]

[0119]

\¥02020/174865 25 卩 (: 17 2019/050965

[Table 8]

[0120]

\¥02020/174865 26 卩(: 17 2019/050965

[Table 9]

[0121] Table 10 shows the corresponding values of the conditional expressions in the second embodiment.

[0122]

\¥02020/174865 27 卩 (: 170?2019/050965

[Table 10]

[0123] Fig. 6 shows the spot diagram of the second example in the wide-angle end state and the telephoto end state, and Fig. 7 shows the distortion diagram of the second example.

[0124] From each aberration diagram, it is apparent that various aberrations are satisfactorily corrected and that this example has excellent imaging performance.

[0125] <Third embodiment>

FIG. 8 shows a lens cross-sectional view of a variable focal length lens system 3 according to the third example of the present technology.

[0126] The first lens group ◦ 1 has a cemented lens !_ 1 1 consisting of a negative meniscus lens with a concave surface facing the image side and a positive lens with a convex surface facing the object side, and a convex surface facing the object side. It consists of a meniscus-shaped positive lens !_ 1 2.

[0127] The second lens group 0 2 is a negative lens !_ 21 with a concave surface facing the image side, and a cemented lens of a biconcave lens and a biconvex lens! -2 2 and a negative lens with concave surface facing the object side !_ 2 \¥02020/174865 28 卩 (: 170?2019/050965

Composed of 3 and.

[0128] The third lens group 0 3 is composed of one first free-form surface lens !_ 3, and the fourth lens group 0 4 is composed of one second free-form surface lens !_ 4. 1 Free-form surface lens !_ 3 and 2nd free-form surface lens !_ 4 are arranged with their axes inverted.

[0129] The fifth lens group 0 5 is a cemented lens which is a biconvex positive lens !_ 5 1 and a positive lens with a convex surface facing the object side and a negative lens with a concave surface facing the image side !_ 5 2 It consists of and.

[0130] 6th lens group ◦ 6 is a positive biconvex lens! -Composed of 6.

[0131] The seventh lens group ◦ 7 is composed of a negative lens !_ 7 having a concave surface facing the image side.

[0132] The eighth lens unit ◦ 8 is composed of a positive lens !_ 8 having a convex surface facing the image side.

[0133] Tables 11 to 14 below show values of specifications of the third embodiment of the present technology. table

1 1 shows lens data such as the radius of curvature of each lens, Table 12 shows the variable interval and movement amount (zoom displacement amount) when changing the focal length, and Table 13 shows the free curved lens. XV free-form surface coefficient (XV polynomial coefficient) that represents the shape of, and Table 14 shows aspherical surface coefficients.

[0134] The meanings of the symbols shown in the following tables and explanations are as shown below.

[0135] In Table 11, "radius of curvature" indicates the reciprocal of curvature, "0" in the "radius of curvature" indicates a plane, and "mouth 11" indicates the 1st surface and the +1st surface. Shows the axial spacing (the thickness of the center of the lens or the air spacing) that is a variable spacing between the two. The "refractive index" and "Abbe number" are the refractive index and the abbe Indicates a number. In Table 12, " _X " and " ₇ " indicate the respective values in the X-axis direction and the vertical axis direction, and the "shift amount" is the first free-form surface lens !_ 3 and the second free-form surface lens 1-4. The amount of movement in the direction of the vertical axis of is shown.

[0136] \\02020/174865 29 卩(: 17 2019/050965

[Table 11]

[0137] \¥0 2020/174865 30 卩 (: 17 2019/050965

[Table 12]

[0138]

\\0 2020/174865 31 卩(: 17 2019/050965

[Table 13]

[0139] [Table 14]

[0140] Table 15 shows the corresponding values of the conditional expressions in the third embodiment.

[0141] \¥02020/174865 32 units (: 170?2019/050965

[Table 15]

[0142] Fig. 9 shows the spot diagram of the third example in the wide-angle end state and the telephoto end state, and Fig. 10 shows the distortion diagram of the third example.

[0143] From each aberration diagram, it is apparent that various aberrations are satisfactorily corrected and that this example has excellent imaging performance.

[0144] [Structure of imaging device]

The imaging device of the present technology has a variable focal length lens system in which the first lens unit is composed of at least one lens group in order from the object side to the image side, the first free-form surface lens and the second free-form surface lens. It is composed of a second lens unit composed of and a third lens unit composed of at least one lens group.

[0145] Further, in the imaging device of the present technology, the variable focal length lens system is configured, and the first lens unit and the third lens unit are composed of lenses that are rotationally symmetric with respect to the optical axis. \¥02020/174865 33 卩 (: 170?2019/050965

In addition, they are arranged on the same optical axis, and the first free-form surface lens and the second free-form surface lens have the same shape and are arranged by rotating 180 degrees with respect to the optical axis.

[0146] Furthermore, in the imaging device of the present technology, the variable focal length lens system has the optical axes of the first lens unit and the third lens unit as axes, and the axis perpendicular to the axes on the image plane as the lower axis. The first free-form surface lens and the second free-form surface lens can move in the direction of the vertical axis, where the vertical axis on the image plane and the axis perpendicular to the axis are the vertical axes.

[0147] In addition, in the imaging device of the present technology, the variable focal length lens system moves the first free-form surface lens and the second free-form surface lens in opposite directions, so that the refractive power of the second lens unit is increased. It is variable, and when the lens position changes from the wide-angle end state where the focal length is the shortest to the telephoto end state where the focal length is the longest, the lens groups that make up the first lens unit and the third lens unit Along with the partial movement, the first free-form surface lens and the second free-form surface lens move in the axial direction.

[0148] In the imaging device of the present technology, the variable focal length lens system includes the first free-form surface lens and the first free-form surface lens.

2 Free-form surface lenses are arranged in the same shape, rotated 180 degrees about the axis. Then, the combined refractive power of the second lens unit changes as the first free-form surface lens and the second free-form surface lens move in opposite directions. By combining this with a general zoom lens, the overall optical length can be shortened while keeping the image plane position constant.

[0149] Whereas in the conventional zoom lens, the moving direction of each lens group is only the optical axis direction, the image pickup device of the present technology uses the two free-form surface lenses of the variable focal length lens system other than the optical axis direction. The degree of freedom to change the focal length is increased by moving to.

[0150] In particular, by making the first free-form surface lens and the second free-form surface lens the same shape, the shape of the free-form surface becomes smooth, and the shift of the stop position and the eccentricity of the free-form surface (the lens on the object side and the image side) It has become possible to prevent performance deterioration due to the surfaces collapsing or moving.

[0151] Also, when the focal length is changed, by moving the first free-form surface lens and the second free-form surface lens by the same amount in opposite directions, the aberration caused by the asymmetrical shape can be obtained. \¥02020/174865 34 卩 (: 170?2019/050965

The occurrence of is canceled out by the two lenses, the first free-form surface lens and the second free-form surface lens, and good optical performance is realized.

[0152] As described above, the imaging device of the present technology can provide various effects, and can provide a small-sized and high-magnification imaging device.

[One Embodiment of Imaging Device]

FIG. 11 shows a block diagram of a digital still camera according to an embodiment of an imaging device of the present technology.

（リーダ/ライタ） 5 0と、 撮像装置 1 0 〇の全体を制御する〇 リ

60と、 ユーザーに よって所要の操作が行われる各種のスイッチ等の入力部 7 0と、 レンズ群 （ 可動群） の駆動を制御するレンズ駆動制御部 8 0とを備えている。 [0154] The image pickup device (digital still camera) 100 is an image pickup device 10 having a photoelectric conversion function for converting captured light into an electric signal, and a signal for analog-digital conversion of a captured image signal. It has a camera signal processing unit 20 for performing processing and an image processing unit 30 for performing recording/reproducing processing of image signals. Further, the image pickup apparatus 100 writes and reads an image signal to and from a display section 40 that displays a shot image and the like, and a memory 90.

(Reader/Writer) 50 and the entire control of the imaging device 100

60, an input unit 70 such as various switches for performing a desired operation by the user, and a lens drive control unit 80 for controlling the drive of the lens group (movable group).

[0155] The camera signal processing unit 20 performs various kinds of signal processing such as conversion of an output signal from the image sensor 10 into a digital signal, noise removal, image quality correction, and conversion into a luminance/color difference signal.

[0156] The image processing unit 30 performs compression coding/expansion decoding processing of an image signal based on a predetermined image data format, conversion processing of data specifications such as resolution, and the like.

[0157] The display section 40 has a function of displaying various data such as an operation state of the user's input section 70 and a captured image.

[0158] 0 is a memory for image data encoded by the image processing unit 30.

_ 90 is written and image data recorded in the memory 90 is read.

[0159] The 0 II 60 functions as a control processing unit that controls each circuit block provided in the imaging device 100, and controls each circuit block based on an instruction input signal from the input unit 70. To do. \\0 2020/174865 35 卩 (: 170?2019/050965

[0160] The input section 70 outputs an instruction input signal corresponding to the user's operation to 〇II60.

[0161] The lens drive control unit 80 controls a motor or the like (not shown) that drives the lens group based on the control signal from 091\60.

0に接続されたスロッ トに対して着脱 可能な半導体メモリーである。 尚、 メモリ— 9 0は、 スロッ トに対して着脱 可能にされておらず、 撮像装置 1 0 0の内部に組み込まれていてもよい。 [0162] The memory 90 is, for example,

It is a semiconductor memory that can be attached to and detached from the slot connected to 0. The memory 90 is not removable from the slot, but may be incorporated inside the image pickup apparatus 100.

[0163] The operation of the image pickup apparatus 100 will be described below.

[0164] In the standby state for shooting, under the control of 0 II 60, the shot image signal is output to the display unit 40 via the camera signal processing unit 20 and displayed as a camera through image.

に出力され、 メモリー 9 0に書き込まれる。 [0165] When photographing is performed by the instruction input signal from the input unit 70, the photographed image signal is output from the camera signal processing unit 20 to the image processing unit 30 and compression-coded, and a predetermined image signal is output. Converted to digital data in data format. The converted data is

Output to and written to memory 90.

[0166] Focusing is based on the control signal from II 60.

80 is performed by moving the focus lens group.

5 0によってメモリー 9 0から所定の画像データ が読み出され、 画像処理部 3 0によって伸張復号化処理が行われた後に、 再 生画像信号が表示部 4 0に出力されて再生画像が表示される。 [0167] When playing back the image data recorded in the memory 90, you may

Predetermined image data is read out from the memory 90 by the memory 50, and after decompression decoding processing is performed by the image processing unit 30, the reproduced image signal is output to the display unit 40 and the reproduced image is displayed. It

によるメモリー 9 0への画像信号 の書込処理までの一連の処理の一部のみ、 または全てを含む処理のことを言 \¥02020/174865 36 卩（：170?2019/050965 [0168] In the present technology, "imaging" refers to photoelectric conversion processing of converting light captured by the imaging element 10 into an electrical signal, and output signal from the imaging element 10 by the camera signal processing unit 20. To digital signals, noise removal, image quality correction, conversion to luminance/color difference signals, and compression/decompression/decoding of image signals based on a predetermined image data format by the image processing unit 30. Conversion processing of data specifications such as resolution,

A process that includes only part or all of a series of processes up to the process of writing an image signal to the memory 90 by \¥02020/174865 36 卩 (: 170?2019/050965

Uh.

によるメモリー 9 0への画像信号の書込処理まで を指してもよい。 上記の処理において各処理の順番は適宜入れ替わつてもよ い。 [0169] That is, "imaging" may refer only to photoelectric conversion processing for converting the light captured by the image sensor 10 into an electrical signal, and the light captured by the image sensor 10 is converted into an electrical signal. You may also refer to the processes from photoelectric conversion processing to conversion to conversion to digital signals of output signals from the image sensor 10 by the camera signal processing unit 20, noise removal, image quality correction, conversion to luminance/color difference signals, etc. , The photoelectric conversion process that converts the light captured by the image sensor 10 into an electrical signal is converted to the digital signal of the output signal from the image sensor 10 by the camera signal processing unit 20, noise removal, image quality correction, and brightness. ·Compression coding of image signals based on a predetermined image data format by the image processing unit 30 after processing such as color difference signal conversion ·Expansion decoding processing and conversion processing of data specifications such as resolution Alternatively, the photoelectric conversion process of converting the captured light by the image sensor 10 into an electric signal may be performed, and the output signal from the image sensor 10 by the camera signal processing unit 20 may be converted into a digital signal, noise removal, Image quality correction, brightness/color difference signal conversion processing, etc., and image processing unit 30 compression coding/decompression/decoding processing of image signals based on a predetermined image data format and conversion processing of data specifications such as resolution. You may point through

It may be up to the process of writing the image signal to the memory 90 by. In the above process, the order of each process may be appropriately changed.

5 0の一部のみまたは 全てを含むように構成されていてもよい。 [0170] In addition, in the present technology, the imaging device 100 includes the image sensor 10 that performs the above processing, the camera signal processing unit 20 and the image processing unit 30.

It may be configured to include only some or all of 50.

[0171] [Others]

In the variable focal length lens system of the present technology and the image pickup apparatus of the present technology, in addition to the first lens group 0 1 to the eighth lens group 08, other optical elements such as lenses having no refractive power are arranged. May be. In this case, the lens configuration of the variable focal length lens system of the present technology is substantially the lens configuration of the first lens group 0 1 to the eighth lens group 08. \¥02020/174865 37 卩(: 17 2019/050965

[0172] The above-described imaging device is used as a camera unit of a digital input/output device such as a digital still camera, a digital video camera, a mobile phone with a built-in camera, or a portable terminal such as a tablet with a built-in camera. It can be widely applied.

[0173] [Application example 1]

The technology according to the present disclosure can be applied to various products. For example, the technology according to the present disclosure may be applied to an operating room system.

[0174] FIG. 12 is a diagram schematically showing an overall configuration of an operating room system 510 to which the technology according to the present disclosure can be applied. Referring to FIG. 12, in the operating room system 510, the devices installed in the operating room are audiovisual controllers (8/

“) 510 and the operating room control device 510” are connected so that they can cooperate with each other.

[0175] Various devices may be installed in the operating room. As an example, Fig. 12 shows a group of various devices for endoscopic surgery 5 101, a ceiling camera 5 1 8 7 installed on the ceiling of the operating room to image the operator's hand, and an operating room. An operating room camera 518 9 installed on the ceiling of the operating room to capture an image of the entire operating room, multiple display devices 5 1 0 3 8 to 5 1 0 3 0, a recorder 5 1 0 5 and a patient bed. 5 1 8 3 and lights 5 1 9 1 are shown.

[0176] Here, among these devices, the device group 5101 belongs to an endoscopic surgery system 5113 described later, and is imaged by the endoscope or the endoscope. It is composed of a display device for displaying an image. Each device belonging to the endoscopic surgery system 5 1 1 3 is also called a medical device. On the other hand, the display devices 5103 to 5103, the recorder 5105, the patient bed 5183 and the illumination 5191 are separated from the endoscopic surgery system 5113. For example, a device installed in an operating room. Each device that does not belong to these endoscopic surgery systems 5 1 1 3 is also called a non-medical device. The audiovisual controller 510 and/or the operating room control device 510 control the operations of these medical devices and non-medical devices in cooperation with each other. \¥02020/174865 38 卩 (: 170?2019/050965

[0177] The audiovisual controller 5107 centrally controls the processing related to image display in medical devices and non-medical devices. Specifically, among the devices included in the operating room system 510, the device group 5101, the ceiling camera 5187 and the operating room camera 518 have information to be displayed during surgery (hereinafter , Which is also referred to as display information) (hereinafter, also referred to as a sender's device). In addition, the display devices 5103 to 5130 may be devices to which display information is output (hereinafter, also referred to as output destination devices). Further, the recorder 510 may be a device that corresponds to both the source device and the output destination device. The audiovisual controller 5107 controls the operations of the transmission source device and the output destination device, acquires display information from the transmission source device, and transmits the display information to the output destination device for display or It has a recording function. The display information includes various images taken during the operation, various information related to the surgery (for example, the patient's physical information, past examination results, information about the surgical procedure, etc.).

[0178] Specifically, the audiovisual controller 5107 has information about the image of the surgical site in the body cavity of the patient, which is imaged by the endoscope, as display information from the device group 5101. Can be sent. Further, the ceiling camera 5187 can transmit, as the display information, information about the image of the operator's hand imaged by the ceiling camera 5187. Further, the operating room camera 5189 can transmit, as the display information, information about an image showing the state of the entire operating room imaged by the operating room camera 5189. If another device having an imaging function is present in the operating room system 510, the audiovisual controller 5107 is also displayed by the other device as the display information. Information about the image may be obtained.

[0179] Alternatively, for example, in the recorder 5105, information about these images captured in the past is recorded by the audiovisual controller 5107. The audiovisual controller 5107 can acquire, as the display information, information about the image captured in the past from the recorder 5105. It should be noted that the recorder 510 may also record various information regarding surgery in advance. Yes.

[0180] The audiovisual controller 5107 is a display device which is an output destination device.

Display the acquired display information (that is, the image captured during the surgery and various information regarding the surgery) on at least one of the ~5103D. In the illustrated example, the display device 5 103 A is a display device that is installed by being suspended from the ceiling of the operating room, and the display device 5 103 B is a display device that is installed on the wall of the operating room. The display device 5103C is a display device installed on a desk in the operating room, and the display device 5103D is a mobile device having a display function (for example, a tablet PC (Persona I Computer)). ..

[0181] Although not shown in Fig. 12, the operating room system 510 may include a device outside the operating room. The device outside the operating room may be, for example, a server connected to a network built inside or outside the hospital, a PC used by medical staff, or a projector installed in a conference room of a hospital. When such an external device is located outside the hospital, the audiovisual controller 5107 may display the display information on the display device of another hospital via a video conference system or the like for remote medical treatment. it can.

[0182] The operating room control device 510 centrally controls processing other than processing related to image display in non-medical devices. For example, the operating room controller 5109 controls the drive of the patient bed 5183, the ceiling camera 518, the operating room camera 518 and the lighting 511.

[0183] The operating room system 510 is provided with a centralized operation panel 5 1 1 1, and the user uses the centralized operation panel 5 1 1 1 to connect to the audiovisual controller 5 1 0 7. It is possible to give an instruction for displaying an image and give an instruction for the operation of the non-medical device to the operating room control device 510. The centralized operation panel 5 1 1 1 1 is configured by providing a touch panel on the display surface of the display device.

[0184] Fig. 13 is a diagram showing a display example of an operation screen on the centralized operation panel 5 1 1 1. In Fig. 13, as an example, the operating room system 510 is connected to the output device. Shows the operation screen corresponding to the case where two display devices are provided. Referring to FIG. 13, the operation screen 5 1 9 3 is provided with a source selection area 5 1 9 5, a preview area 5 1 9 7 and a control area 5 2 0 1.

[0185] In the sender selection area 5195, the sender device provided in the operating room system 510 and the thumbnail screen showing the display information of the sender device are displayed in association with each other. It The user can select the display information to be displayed on the display device from any of the transmission source devices displayed in the transmission source selection area 5 195.

[0186] In the preview area 5197, a preview of the screen displayed on the two display devices (Monit or U Monitor) that are the output destination devices is displayed. In the example shown, four images are displayed in P in P on one display device. The four images correspond to the display information transmitted from the transmission source device selected in the transmission source selection area 5195. Of the four images, one is displayed relatively large as the main image and the remaining three are displayed relatively small as sub-images. The user can switch the main image and the sub image by appropriately selecting the area in which the four images are displayed. A status display area 519 9 is provided below the area where the four images are displayed, and the status related to the operation (for example, the elapsed time of the operation, the physical information of the patient, etc.) is provided in the area. ) Can be displayed as appropriate.

[0187] The control area 5201 is a source operation area 5203 that displays GUI (Graphical User Interface) parts for operating the source device and the output destination. An output destination operation area 5205 for displaying GU parts for operating the device is provided. In the example shown in the figure, the sender operation area 5203 is equipped with GU parts for performing various operations (pan, tilt, and zoom) on the camera of the sender device having an imaging function. It has been done. The user can operate the operation of the camera in the transmission source device by appropriately selecting these GU parts. The illustration is omitted. \¥02020/174865 41 卩 (: 170?2019/050965

However, if the source device selected in the source selection area 5 195 is a recorder (that is, in the preview area 5 197, an image recorded in the past is displayed on the recorder). In the case), the sender operation area 520 3 may be provided with a part for performing operations such as reproduction, stop reproduction, rewind, and fast forward of the image.

品が設けられて いる。 ユーザは、 これらの◦ II 丨部品を適宜選択することにより、 表示装置 における表示を操作することができる。 [0188] Also, in the output destination operation area 5205, various operations (swap, flip, color adjustment, contrast adjustment, 20 display and 3 0 display for the display on the display device which is the output destination are performed. (To switch the display)

Goods are provided. The user can operate the display on the display device by appropriately selecting one of these parts.

[0189] The operation screen displayed on the centralized operation panel 5 1 1 1 is not limited to the example shown in the figure, and the user can prepare for the operating room system 5 1 0 0 via the centralized operation panel 5 1 1 1. It may be possible to input an operation to each device that can be controlled by the audiovisual controller 5107 and the operating room control device 5109.

[0190] Fig. 14 is a diagram showing an example of a state of surgery to which the operating room system described above is applied. The ceiling camera 5 1 8 7 and the operating room camera 5 1 8 9 are provided on the ceiling of the operating room and are used by a surgeon (doctor) who performs treatment on the affected area of the patient 5 1 8 5 on the patient bed 5 1 8 3. ) It is possible to take a picture of the condition of the hand and the entire operating room. The ceiling camera 518 and the operating room camera 518 may be provided with a magnification adjusting function, a focal length adjusting function, a photographing direction adjusting function, and the like. The lighting 5 1 9 1 is installed on the ceiling of the operating room and illuminates at least the hand of the operator 5 1 8 1. The illumination 519 1 may be capable of appropriately adjusting the amount of irradiation light, the wavelength (color) of irradiation light, the irradiation direction of light, and the like.

[0191] Endoscopic surgery system 5 1 1 3, patient bed 5 1 8 3, ceiling camera 5

As shown in FIG. 12, the visual field auditory controller 5107 and the operating room controller 5109 (not shown in FIG. No.) are connected so that they can cooperate with each other. A centralized operation panel 5 1 1 1 1 is provided in the operating room. \¥02020/174865 42 卩 (: 170?2019/050965

It is possible to appropriately operate these devices existing in the operating room through the panel 5 1 1 1.

[0192] Hereinafter, the configuration of the endoscopic surgery system 5 1 1 3 will be described in detail. As shown in the figure, the endoscopic surgery system 5 1 1 3 includes an endoscope 5 1 1 5 and other surgical tools 5 1 3 1 and a support arm device 5 1 that supports the endoscope 5 1 1 5. 4 1 and a force unit 5 1 5 1 equipped with various devices for endoscopic surgery.

[0193] In endoscopic surgery, instead of cutting the abdominal wall to open the abdomen, trocar 5 1 39 ₃ ~

A plurality of tubular openers called 5 1 39 are punctured in the abdominal wall. Then, the lens barrel 5 1 1 3 of the endoscope 5 1 1 5 and other surgical tools 5 1 3 1 are inserted into the body cavity of the patient 5 1 8 5 from the rocker lockers 5 1 39 3 to 5 1 39. It In the example shown in the figure, a pneumoperitoneum tube 5 133, an energy treatment tool 5 1 35 and forceps 5 1 37 are inserted into the body cavity of the patient 5 1 85 as other surgical tools 5 1 3 1. Further, the energy treatment tool 51-35 is a treatment tool for performing incision and separation of tissue, sealing of blood vessels, and the like by high-frequency current or ultrasonic vibration. However, the illustrated technique *5 1 3 1 is only an example, and various types of surgical instruments commonly used in endoscopic surgery such as a concussion and a retractor are used as the surgical instrument 5 13 1. You can

[0194] An image of the surgical site in the body cavity of the patient 5 1 85 taken by the endoscope 5 1 1 5 is displayed on the display device 5 1 55. The surgeon 5 1 81 uses the energy treatment tool 5 1 35 and forceps 5 1 37 while watching the image of the surgical site displayed on the display device 5 1 55 in real time, for example, to perform treatment such as excision of the affected area. I do. Although illustration is omitted, the pneumoperitoneum tube 5 1 33, the energy treatment tool 5 1 35, and the forceps 5 1 37 are supported by the operator 5 18 1 or an assistant or the like during the operation.

[0195] (Support arm device)

The support arm device 5 1 4 1 includes an arm portion 5 1 45 extending from the base portion 5 1 43. In the example shown, the arm portion 5 1 45 is the joint portion 5 1 473, It is composed of 5 1 4 7 b, 5 1 4 7 c, and links 5 1 4 9 a and 5 1 4 9 b, and is driven by the control from the arm controller 5 1 5 9. The endoscope 5 1 1 5 is supported by the arm 5 1 4 5 and its position and posture are controlled. As a result, stable fixation of the endoscope 5115 can be realized.

[0196] (Endoscope)

The endoscope 5 1 15 is connected to the lens barrel 5 1 1 7 where a region of a predetermined length from the distal end is inserted into the body cavity of the patient 5 1 8 5 and the proximal end of the lens barrel 5 1 1 7. It is composed of the camera head 5 1 1 9 and. In the example shown in the figure, the endoscope 5 1 15 that is configured as a so-called rigid endoscope having a rigid lens barrel 5 1 17 is shown, but the endoscope 5 1 15 is a flexible mirror. It may be configured as a so-called flexible mirror having a cylinder 5 117.

[0197] An opening in which an objective lens is fitted is provided at the tip of the lens barrel 5 1 1 7. A light source device 5 1 5 7 is connected to the endoscope 5 1 15 and light generated by the light source device 5 1 5 7 is extended to the inside of the lens barrel 5 1 1 7. The light is guided to the tip of the lens barrel by the guide, and is irradiated toward the observation target in the body cavity of the patient 518 through the objective lens. It should be noted that the endoscope 5115 may be a direct-viewing endoscope, or a perspective or side-viewing endoscope.

[0198] An optical system and an image pickup device are provided inside the camera head 511 and the reflected light (observation light) from the observation target is focused on the image pickup device by the optical system. The observation light is photoelectrically converted by the imaging device, and an electric signal corresponding to the observation light, that is, an image signal corresponding to the observation image is generated. The image signal is sent to the camera control unit (CCU: Camera Control Unit) 5 1 5 3 as R A W data. The camera head 511 is equipped with a function to adjust the magnification and focal length by appropriately driving the optical system.

[0199] Note that, for example, to support stereoscopic viewing (3D display), etc., the camera head 5 1

A plurality of image pickup devices may be provided in 19. In this case, the relay light is introduced inside the lens barrel 5 1 1 1 7 in order to guide the observation light to each of the plurality of image pickup elements. There are multiple academic systems.

[0200] (Various devices installed in one unit)

The CCU 515 is composed of a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and the like, and integrally controls the operations of the endoscope 5115 and the display device 515. Specifically, the CCU 5 1 53 displays an image based on the image signal, such as development processing (demosaic processing), on the image signal received from the camera head 5 1 19. Various image processing of. The CCU 5 1 53 provides the image signal subjected to the image processing to the display device 5 1 55. Also, the audiovisual controller 5107 shown in FIG. 12 is connected to the ◯115115. The CCU 5 1 53 also provides the image signal subjected to the image processing to the audiovisual controller 5 107. The CCU 5 1 53 also sends a control signal to the camera head 5 1 19 to control its drive. The control signal may include information regarding imaging conditions such as magnification and focal length. The information regarding the imaging condition may be input via the input device 5 1 61 or the above-described centralized operation panel 5 1 1 1.

[0201] The display device 5 1 55 is controlled by the CC U 5 1 53, and the CCU 5 1 5

An image based on the image signal subjected to the image processing by 53 is displayed. The endoscope 5 1 1 5 is compatible with high-resolution shooting such as 4 K (horizontal pixel number 3840 x vertical pixel number 2 1 60) or 8 K (horizontal pixel number 7680 x vertical pixel number 4320). , And/or 3D display, the display device 5 1 55 is capable of high-resolution display and/or 3D display. Can be used. If the device is compatible with high-resolution shooting such as 4 K or 8 K, a more immersive feeling can be obtained by using a display device 5 1 55 having a size of 55 inches or more. Further, a plurality of display devices 5 1 55 having different resolutions and sizes may be provided depending on the application.

[0202] The light source device 5 1 57 is composed of a light source such as an LED (Ught emitting diode), and supplies the endoscope 5 1 15 with irradiation light for photographing the operation part. [0203] The arm control device 5 1 5 9 is composed of, for example, a processor such as a CPU, and operates according to a predetermined program, so that the arm portion 5 1 of the support arm device 5 1 4 1 follows a predetermined control method. Control the drive of 4 5.

[0204] The input device 5 16 1 is an input interface to the endoscopic surgery system 5 1 13. The user can input various information and instructions to the endoscopic surgery system 5 1 1 3 via the input device 5 16 1. For example, the user inputs various kinds of information related to the surgery, such as the physical information of the patient and the information about the surgical procedure through the input device 5 16 1. In addition, for example, the user may give an instruction to drive the arm unit 5 1 45 via the input device 5 1 6 1, and the imaging conditions (type of irradiation light, magnification and magnification) of the endoscope 5 1 15. Input the instruction to change the focal length, etc.) and the instruction to drive the energy treatment tool 5 1 3 5.

[0205] The type of the input device 5 16 1 is not limited, and the input device 5 16 1 may be various known input devices. As the input device 5 16 1, for example, a mouse, a keyboard, a touch panel, a switch, a foot switch 5 17 1 and/or a lever can be applied. When a touch panel is used as the input device 5 1 61, the touch panel may be provided on the display surface of the display device 5 1 5 5.

[0206] Alternatively, the input device 5 16 1 is a device worn by a user, such as a wearable device of a glasses type or a head mounted display (HMD), and a user detected by these devices. Various inputs are made according to the gesture and the line of sight. In addition, the input device 5 16 1 includes a camera capable of detecting the movement of the user, and various inputs are performed according to the user's gesture or line of sight detected from the image captured by the camera. Further, the input device 516 1 includes a microphone capable of collecting the user's voice, and various inputs are performed by voice through the microphone. In this way, the input device 5 16 1 is configured to be able to input various kinds of information in a contactless manner, so that a user who belongs to a clean area (for example, a surgeon 5 1 8 1) is a device that belongs to a dirty area. \¥02020/174865 46 卩 (: 170?2019/050965

Can be operated without contact. In addition, the user can operate the device without releasing his/her hand from the surgical tool, which improves the convenience of the user.

[0207] The treatment instrument control device 5 1 63 controls the drive of the energy treatment instrument 5 1 35 for cauterization of tissue, incision, sealing of blood vessels, and the like. The pneumoperitoneum device 5 1 65 is used to expand the body cavity of the patient 5 1 8 5 for the purpose of securing a visual field by the endoscope 5 1 15 and a working space for the operator. 1 Inject gas into the body cavity through 33. The recorder 5 1 67 is a device that can record various information related to surgery. The printer 5 169 is a device capable of printing various information regarding surgery in various formats such as text, images, and graphs.

[0208] Hereinafter, a particularly characteristic configuration of the endoscopic surgery system 5 1 1 3 will be described in more detail.

[0209] (Support arm device)

The support arm device 5 1 41 includes a base portion 5 1 43 which is a base and an arm portion 5 1 45 extending from the base portion 5 1 43. In the example shown, the arm section 5 1 45 is composed of multiple joint sections 5 1 473, 5 1 47 5 1 47. , And a plurality of links 5 1 493, 5 1 49, which are connected by the joint 5 1 47 arm, but in FIG. 14 the arm portion 5 1 45 is composed for simplification. Are simplified and illustrated. In practice, the shape, number and arrangement of the joints 5 1 47 _{3 to} 5 1 47 0 and the links 5 1 493, 5 1 49, and the joints so that the arm 5 1 45 has a desired degree of freedom. The direction of the rotation axis of 5 1 47 ₃ to 5 1 47 〇 can be appropriately set. For example, the arm portion 145 may suitably be configured to have 6 or more degrees of freedom. This enables the endoscope 5 1 15 to move freely within the movable range of the arm 5 1 45, so that the lens barrel 5 1 1 7 of the endoscope 5 1 1 5 can be moved from a desired direction. Can be inserted into the body cavity of the patient 5 1 85.

[0210] An actuator is provided in the joint part 5 1 47 ₃ to 5 1 47 〇, and the joint part 5 1 47 ₃ to 5 1 47 〇 rotates in accordance with the drive of the actuator. \¥02020/174865 47 卩 (: 170?2019/050965

It is configured to be rotatable around an axis. The drive of the actuator is controlled by the arm controller 5 15 9 to control the rotation angles of the joints 5 1 4 7 ₃ to 5 1 4 7 0 and control the drive of the arm 5 1 4 5. To be done. With this, control of the position and posture of the endoscope 5115 can be realized. At this time, the arm controller 5 159 can control the drive of the arm 5 14 5 by various known control methods such as force control or position control.

[021 1] For example, the surgeon 5 1 8 1 makes an appropriate operation input via the input device 5 1 6 1 (including the foot switch 5 1 7 1), and the arm 5 The controller 5 1 5 9 may appropriately control the driving of the arm 5 1 4 5 to control the position and posture of the endoscope 5 1 1 5. By this control, the endoscope 5 1 15 at the tip of the arm 5 14 5 can be moved from any position to any position and then fixedly supported at the position after the movement. It should be noted that the arm portions 5145 may be operated by a so-called master slave method. In this case, the arm unit 5 1 4 5 can be remotely operated by the user via the input device 5 1 6 1 installed at a place apart from the operating room.

[0212] Further, when force control is applied, the arm control device 5 1 5 9 receives an external force from the user, and the arm portion 5 1 4 5 moves smoothly in accordance with the external force. each joint 5 1 4 7 _3-5 1 4 Ru by driving the actuator of 7_Rei may perform a so-called power assist control. Accordingly, when the user moves the arm unit 5 1 45 while directly touching the arm unit 5 1 45, the arm unit 5 1 45 can be moved with a comparatively light force. Therefore, the endoscope 5115 can be moved more intuitively and with a simpler operation, and the convenience for the user can be improved.

[0213] Here, in general, in endoscopic surgery, a doctor called a scopist supports the endoscope 5 115. On the other hand, by using the support arm device 5 1 41, it is possible to fix the position of the endoscope 5 1 1 5 more reliably without the need for manual labor, so that the image of the surgical site is stabilized. It is possible to obtain the desired results and to perform the procedure smoothly. [0214] Note that the arm control device 5 15 9 does not necessarily have to be provided in the force controller 5 1 5 1. Also, the arm control device 5 15 9 does not necessarily have to be one device. For example, the arm control device 5 1 5 9 may be provided in each joint part 5 1 4 7a to 5 1 4 7 c of the arm part 5 1 4 5 of the support arm device 5 1 4 1, respectively. The drive control of the arm units 5 1 4 5 may be realized by the plurality of arm control devices 5 1 5 9 cooperating with each other.

[0215] (Light source device)

The light source device 5 1 5 7 supplies the endoscope 5 1 1 5 with irradiation light for imaging the surgical site. The light source device 5 15 7 is composed of, for example, an LED, a laser light source, or a white light source configured by a combination thereof. At this time, when a white light source is configured by combining RGB laser light sources, the output intensity and output timing of each color (each wavelength) can be controlled with high accuracy, so the light source device 5 1 5 7 It is possible to adjust the white balance of the captured image. In this case, the laser light from each of the RGB laser light sources should be applied to the observation target in a time-division manner, and the drive of the image sensor of the camera head 5 1 1 9 should be controlled in synchronization with the irradiation timing. This makes it possible to capture images corresponding to each of RGB in time division. According to this method, a color image can be obtained without providing a force filter on the image sensor.

[0216] Further, the drive of the light source devices 5 1 5 7 may be controlled so as to change the intensity of the output light at predetermined time intervals. By controlling the drive of the image sensor of the camera head 5 1 1 9 in synchronism with the timing of changing the light intensity, images are acquired in a time-sharing manner, and the images are combined to create so-called blackout and white areas. It is possible to generate an image with a high dynamic range without breaks.

[0217] Further, the light source devices 5 15 7 may be configured to be able to supply light in a predetermined wavelength band corresponding to special light observation. In the special light observation, for example, the wavelength dependence of the absorption of light in body tissues is used to irradiate a narrow band of light as compared with the irradiation light (that is, white light) at the time of normal observation. High-contrast imaging of certain tissues such as blood vessels in d Imag i ng) is performed. Alternatively, in the special light observation, fluorescence observation may be performed in which an image is obtained by fluorescence generated by irradiating the excitation light. In fluorescence observation, the body tissue is irradiated with excitation light to observe fluorescence from the body tissue (autofluorescence observation), or a reagent such as indocyanine green (ICG) is locally injected into the body tissue and the body tissue is injected. For example, the tissue may be irradiated with excitation light corresponding to the fluorescence wavelength of the reagent to obtain a fluorescent image. The light source device 5 15 7 can be configured to be able to supply the narrow band light and/or the excitation light corresponding to such special light observation.

[0218] (Camera head and C C U)

With reference to FIG. 15, the functions of the camera head 5 1 1 9 and the CCU 5 1 5 3 of the endoscope 5 1 1 5 will be described in more detail. FIG. 15 is a block diagram showing an example of the functional configuration of the camera head 511 and CCU 5153 shown in FIG.

[0219] Referring to FIG. 15, the camera head 5 1 1 9 has, as its functions, a lens unit 5 1 2 1, an imaging unit 5 1 2 3, a driving unit 5 1 2 5 and a communication unit. It has a section 5 1 2 7 and a camera head control section 5 1 2 9. The CCU 5153 has, as its functions, a communication unit 5173, an image processing unit 5175, and a control unit 5177. The camera head 5 1 19 and the CCU 5 1 5 3 are connected by a transmission cable 5 1 7 9 so that they can communicate in both directions.

[0220] First, the functional configuration of the camera head 5 1 1 9 will be described. The lens unit 5 1 2 1 is an optical system provided at a connection portion with the lens barrel 5 1 1 7. The observation light taken in from the tip of the lens barrel 5 1 1 7 is guided to the camera head 5 1 1 9 and enters the lens unit 5 1 2 1. The lens unit 5 1 2 1 is configured by combining a plurality of lenses including a zoom lens and a focus lens. The optical characteristics of the lens unit 5 1 2 1 are adjusted so that the observation light is condensed on the light receiving surface of the image pickup device of the image pickup unit 5 1 2 3. Further, the zoom lens and the focus lens are configured so that their positions on the optical axis can be moved in order to adjust the magnification and focus of the captured image.

[0221] The image pickup unit 5 1 2 3 is composed of an image pickup element, and the lens unit 5 1 2 1 It is placed in the latter stage. The observation light that has passed through the lens unit 5 1 2 1 is focused on the light-receiving surface of the image sensor, and photoelectric conversion generates an image signal corresponding to the observation image. The image signal generated by the imaging unit 5 1 2 3 is provided to the communication unit 5 1 2 7.

[0222] As an image pickup device that constitutes the image pickup unit 5 1 2 3, for example, a CMOS (Complementary Metal Oxide de Sem i conductor) type image sensor, which has a Bayer array and is capable of color imaging, is used. Used. It should be noted that as the imaging element, for example, an imaging element that can be used to capture a high-resolution image of 4 K or more may be used. Since the image of the operative site is obtained with high resolution, the operator 518 1 can grasp the state of the operative site in more detail, and the operation can proceed more smoothly.

[0223] Further, the image pickup device forming the image pickup unit 5 1 2 3 is configured to have a pair of image pickup devices for respectively acquiring image signals for the right eye and the left eye corresponding to 3D display. .. The 3D display enables the operator 5 18 1 to more accurately grasp the depth of the living tissue in the operation site. If the image pickup unit 5 1 2 3 is composed of a multi-plate type, a plurality of lens units 5 1 2 1 are provided corresponding to each image pickup device.

[0224] Further, the imaging unit 5 1 2 3 does not necessarily have to be provided in the camera head 5 1 1 9. For example, the imaging unit 5 1 2 3 may be provided inside the lens barrel 5 1 1 7 immediately after the objective lens.

[0225] The drive unit 5 1 2 5 is composed of an actuator, and the zoom lens and the focus lens of the lens unit 5 1 2 1 are moved along the optical axis according to the control from the camera head control unit 5 1 2 9. Move only a distance. As a result, the magnification and focus of the imaged image by the imaging unit 5 1 2 3 can be adjusted appropriately.

The communication unit 5 1 2 7 is composed of a communication device for transmitting and receiving various kinds of information to and from the CCU 5 1 5 3. The communication unit 5 1 2 7 sends the image signal obtained from the imaging unit 5 1 2 3 as RAW data to the CCU 5 1 5 3 via the transmission cable 5 1 7 9. At this time, in order to display the captured image of the operative area with low latency, The image signal is preferably transmitted by optical communication. At the time of surgery, the operator 5181 performs the operation while observing the state of the affected area by the captured images, so for safer and more reliable surgery, the moving image of the operation area should be as realistic as possible. This is because it is required to be displayed on Im. When optical communication is performed, the communication unit 5 1 2 7 is provided with a photoelectric conversion module that converts an electric signal into an optical signal. The image signal is converted into an optical signal by the photoelectric conversion module, and then transmitted to the CCU 5 15 3 via the transmission cable 5 17 9.

[0227] Also, the communication unit 5 1 2 7 receives a control signal for controlling the driving of the camera head 5 1 1 9 from the CCU 5 1 5 3. The control signal includes, for example, information that specifies the frame rate of the captured image, information that specifies the exposure value at the time of capturing, and/or information that specifies the magnification and focus of the captured image. It contains information about imaging conditions. The communication unit 5 1 2 7 provides the received control signal to the camera head control unit 5 1 2 9. The control signal from CCU 515 3 may also be transmitted by optical communication. In this case, the communication unit 5 1 2 7 is provided with a photoelectric conversion module that converts an optical signal into an electric signal, and the control signal is converted into an electric signal by the photoelectric conversion module and then the camera head control unit 5 Offered on 1 29.

[0228] Note that the imaging conditions such as the frame rate, the exposure value, the magnification, and the focus described above are automatically set by the control unit 5 1 7 7 of the CCU 5 15 3 based on the acquired image signal. That is, the so-called A E (Auto Exposure) function, A F (Auto Focus) function, and A W B (Auto White Balance) function are mounted on the endoscope 5 1 1 5.

[0229] The camera head control unit 5 1 2 9 receives the C C U received via the communication unit 5 1 2 7.

The drive of the camera head 5 1 1 9 is controlled based on the control signal from 5 1 5 3. For example, the camera head control unit 5 1 2 9 may capture the image of the image capturing unit 5 1 2 3 based on the information indicating the frame rate of the captured image and/or the information indicating the exposure at the time of image capturing. Control the drive of the device. In addition, for example, the camera head control unit 5 1 2 9 sets the magnification and focus of the captured image based on the information to be specified. , The zoom lens and focus lens of the lens unit 5 1 2 1 are appropriately moved through the drive unit 5 1 2 5. The camera head controller 5 1 2 9 may further have a function of storing information for identifying the lens barrel 5 1 1 7 and the camera head 5 1 1 9.

[0230] Note that by arranging the lens unit 5 1 2 1 and the image pickup unit 5 1 2 3 in a hermetically sealed structure that is highly airtight and waterproof, the camera head 5 1 1 9 can be automatically controlled. It can be made resistant to crepe sterilization.

[0231] Next, the functional configuration of the CCU 5153 will be described. The communication unit 5 17 3 is composed of a communication device for transmitting and receiving various kinds of information to and from the camera head 5 1 1 9. The communication section 5 17 3 receives the image signal transmitted from the camera head 5 1 19 via the transmission cable 5 1 7 9. At this time, as described above, the image signal can be preferably transmitted by optical communication. In this case, in correspondence with optical communication, the communication unit 5173 is provided with a photoelectric conversion module for converting an optical signal into an electric signal. The communication unit 5 17 3 provides the image signal converted to an electric signal to the image processing unit 5 17 5.

[0232] In addition, the communication unit 5 17 3 is different from the camera head 5 1 1 9 in that

5 Sends a control signal to control the drive of 1 1 9. The control signal may also be transmitted by optical communication.

[0233] The image processing unit 5175 performs various types of image processing on the image signal which is the RA W data transmitted from the camera head 5 1 19. Examples of the image processing include development processing, high image quality processing (band enhancement processing, super-resolution processing, NR (Noise reduction) processing and/or camera shake correction processing), and/or enlargement processing ( Electronic zoom processing), and various other known signal processing are included. Further, the image processing unit 5175 performs detection processing on the image signal for performing A E, A F, and A W B.

[0234] The image processing unit 5175 is composed of a processor such as a CPU and a GPU, and the image processing and detection processing described above can be performed by the processor operating according to a predetermined program. The image processing unit 5 1 7 5 has multiple G \¥0 2020/174865 53 卩 (: 170?2019/050965

When configured by II, the image processing unit 5175 appropriately divides information related to the image signal and performs image processing in parallel by the plurality of II.

[0235] The control unit 5 17 7 carries out various controls relating to the imaging of the surgical site by the endoscope 5 1 15 and the display of the captured image. For example, the control unit 5 17 7 generates a control signal for controlling the driving of the camera head 5 1 1 7. At this time, when the imaging condition is input by the user, the control unit 517 7 generates a control signal based on the input by the user. Alternatively, when the endoscope 5 1 15 is equipped with the eight-axis function, the function, and the number-of-fault function, the control unit 5 1 7 7 controls the image processing unit 5 1 7 5 according to the detection processing result. , The optimum exposure value, focal length and white balance are calculated as appropriate, and the control signal is generated.

Further, the control unit 5 17 7 causes the display device 5 1 5 5 to display the image of the operation unit based on the image signal subjected to the image processing by the image processing unit 5 1 7 5. At this time, the control unit 517 recognizes each kind of object in the operative image by using various image recognition techniques. For example, the control unit 5 17 7 detects the shape and color of the edge of the object included in the surgical region image to determine the surgical instrument such as forceps, a specific living body part, bleeding, energy treatment device 5 1 3 5 It is possible to recognize the mist, etc. during use. When displaying the image of the operative site on the display device 515, the control unit 517 uses the recognition result to superimpose and display various types of surgical support information on the image of the operative site. By displaying the surgery support information in a superimposed manner and presenting it to the operator 5181, it becomes possible to proceed with the surgery more safely and reliably.

を接続する伝送ケーブル 5 1 7 [0237] Camera head 5 1

Transmission cable for connecting 5 1 7

9 is an electrical signal Ke ^_ Bull corresponding to the communication of electrical signals, light off Aiba corresponding to optical communication, or a composite cable.

[0238] Here, in the example shown in the figure, wired communication was performed using the transmission cable 5179, but communication between the camera head 511 It may be performed wirelessly. If the communication between the two is performed wirelessly, it is not necessary to lay the transmission cable 5179 in the operating room, and therefore the movement of medical staff in the operating room is hindered by the transmission cable 5179. The situation is solved Can be erased.

[0239] The example of the operating room system 510 to which the technology according to the present disclosure can be applied has been described above. Here, as an example, the case where the medical system to which the operating room system 510 is applied is the endoscopic surgery system 5113 is explained. However, the configuration of the operating room system 510 is as follows. It is not limited to such an example. For example, the operating room system 5100 may be applied to a flexible endoscopic system for examination or a microscopic surgery system instead of the endoscopic surgery system 5113.

[0240] The technique according to the present disclosure includes the ceiling camera 5 18 among the configurations described above.

It can be suitably applied to a 7 or a surgical field camera 189 or an endoscope. Specifically, it can be applied to imaging devices such as these cameras and endoscopes, and variable focal length lens systems in these imaging devices. By applying the technology according to the present disclosure to these cameras and endoscopes, it is possible to obtain clearer images of the surgical site.

[0241] [Application example 2]

The technology according to the present disclosure can be applied to various products. For example, the technology related to this disclosure may be any of automobiles, electric vehicles, hybrid electric vehicles, motorcycles, bicycles, personal mobility, airplanes, drones, ships, robots, construction machinery, agricultural machinery (tractors), etc. It may be applied to an image pickup device or a variable focal length lens system mounted on a moving body of this type.

[0242] FIG. 16 is a block diagram showing a schematic configuration example of a vehicle control system 700 that is an example of a mobile body control system to which the technology according to the present disclosure can be applied. The vehicle control system 700 includes a plurality of electronic control units connected via a communication network 7100. In the example shown in Fig. 16, the vehicle control system 700 is a drive system control unit 7100, a body system control unit 7200, a battery control unit 7300, and vehicle exterior information. A detection unit 7400, an in-vehicle information detection unit 7500, and an integrated control unit 7600 are provided. A communication network for connecting these control units is, for example, CAN (Con troller Area Network), LIN (Local Interconnect Network), LAN (Local Area Network) or FI ex R ay (registered trademark ), etc., may be an in-vehicle communication network that complies with any standard.

[0243] Each control unit includes a microcomputer that performs arithmetic processing according to various programs, a storage unit that stores a program executed by a microcomputer or parameters used for various arithmetic operations, and devices to be controlled. And a drive circuit for driving. Each control unit is equipped with a network/F for communicating with other control units via the communication network 7010, and also with devices inside or outside the vehicle, sensors, etc. It is equipped with a communication system /F for performing communication by wire communication or wireless communication. In Fig. 16, the functional configuration of the integrated control unit 7600 is as follows: Microcomputer 7610, General-purpose communication I/F 7620, Dedicated communication I/F 7630, Positioning unit 7640, Beacon receiving unit 7650, In-vehicle device I/F 7660 The audio/video output unit 7670, the in-vehicle network I/F 7680, and the storage unit 7690 are illustrated. Similarly, the other control units are also equipped with a microcomputer, communication/F, and storage.

[0244] The drive system control unit 7100 controls the operation of devices related to the drive system of the vehicle according to various programs. For example, the drive system control unit 7100 is a drive force generation device for generating drive force of a vehicle such as an internal combustion engine or a drive motor, a drive force transmission mechanism for transmitting drive force to wheels, It functions as a steering mechanism that adjusts the steering angle and as a control device such as a braking device that generates the braking force of the vehicle. The drive system control unit 7100 may have a function as a control device such as an ABS (Anti lock Brake System) or an ESC (Electronic Stability Control).

[0245] The vehicle state detection unit 711 is connected to the drive system control unit 710. The vehicle state detection unit 7 1 1 1 0 includes, for example, a gyro sensor that detects the angular velocity of the shaft rotational movement of the vehicle body, an acceleration sensor that detects the acceleration of the vehicle, or the operation amount of the axel pedal, the operation amount of the brake pedal, and the steering At least one of the sensors for detecting the steering angle of the wheel, the engine speed, the rotational speed of the wheel, etc. is included. The drivetrain control unit 7 100 is The arithmetic processing is performed by using the signal input from the detection unit 7110, and the internal combustion engine, the drive motor, the electric power steering device, the brake device, and the like are controlled.

[0246] The body system control unit 7200 controls the operation of various devices mounted on the vehicle body according to various programs. For example, the body system control unit 720 is used as a keyless entry system, smart key system, power window device, or as a control device for various lamps such as headlamps, back lamps, brake lamps, win-win or fog lights. Function. In this case, radio waves or signals from various switches transmitted from a portable device that substitutes for a key can be input to the body system control unit 700. The body system control unit 7200 receives these radio waves or signals and controls the vehicle door lock device, power window device, lamp, and the like.

[0247] The battery control unit 7300 controls the secondary battery 7310 that is a power supply source for the drive mode according to various programs. For example, information such as the battery temperature, the battery output voltage, or the remaining capacity of the battery is input to the battery control unit 7300 from the battery device including the secondary battery 7310. The battery control unit 7300 performs arithmetic processing using these signals to control the temperature of the secondary battery 7310 or the cooling device provided in the battery device.

[0248] The vehicle exterior information detection unit 740 detects information outside the vehicle equipped with the vehicle control system 7000. For example, at least one of the image pickup unit 7410 and the exterior information detection unit 7420 is connected to the exterior information detection unit 7400. The image capturing unit 741 includes at least one of a T F (T i Me Of F l i ght) camera, a stereo camera, a monocular camera, an infrared camera and other cameras. The vehicle exterior information detection unit 7420 includes, for example, an environment sensor for detecting the current weather or the weather, or another vehicle around the vehicle equipped with the vehicle control system 70000, an obstacle, or an obstacle. At least one of the surrounding information detection sensors for detecting a pedestrian or the like is included.

[0249] The environment sensor is, for example, a raindrop sensor that detects rainy weather, or a fog sensor that detects fog. At least one of a sun sensor, a sun sensor that detects the degree of sunshine, and a snow sensor that detects snowfall. The ambient information detection sensor may be at least one of an ultrasonic sensor, a radar device, and a L DAR (Light Detection and Ranging, Laser Imaging Detection and Ranging) device. The image pickup unit 74 10 and the vehicle exterior information detection unit 7420 may be provided as independent sensors or devices, or may be provided as a device in which a plurality of sensors or devices are integrated.

[0250] Here, Fig. 17 shows an example of the installation positions of the imaging unit 7410 and the vehicle exterior information detection unit 7420. The imaging unit 79 1 0, 79 1 2, 79 1 4, 79 1 6, 79 1 8 is, for example, at least one of the front nose of the vehicle 7900, the side mirror, the rear bumper, the back door, and the upper part of the windshield inside the vehicle. It is provided in one position. The image pickup unit 79 10 provided on the front nose and the image pickup unit 79 18 provided on the upper part of the windshield in the vehicle interior mainly acquire images in front of the vehicle 7900. The imaging unit 79 1 2, 7 9 14 provided in the side mirror mainly acquires an image of the side of the vehicle 7900. The image pickup unit 79 16 provided in the rear bumper or the back door mainly acquires an image of the rear of the vehicle 7900. The imaging unit 79 18 provided on the upper part of the windshield inside the vehicle is mainly used for detecting a preceding vehicle or a pedestrian, an obstacle, a traffic signal, a traffic sign or a lane.

[0251] Note that in Fig. 17, the respective imaging units 79 1 0, 79 1 2, 79 1 4, 7

An example of a shooting range of 9 16 is shown. Imaging range a indicates the imaging range of the imaging unit 79 10 provided on the front nose, and imaging ranges b and c indicate the imaging range of the imaging units 79 1 2, 79 1 4 provided on the side mirrors, respectively. The image pickup range d indicates the image pickup range of the image pickup section 79 16 provided on the rear bumper or the back door. For example, by superimposing the image data taken by the imaging units 79 1 0, 79 1 2, 79 1 4, 79 16 on top of each other, a bird's-eye view of the vehicle 7900 from above can be obtained.

[0252] Vehicle 7900 front, rear, side, corner, and front doors in the passenger compartment. \¥02020/174865 58 卩 (: 170?2019/050965

The vehicle exterior information detectors 7 9 2 0, 7 9 2 2, 7 9 2 4, 7 9 2 6, 7 9 2 8 and 7 9 30 provided on the top of the lath are, for example, ultrasonic sensors or radar devices. You may The vehicle exterior information detectors 7 9 2 0 ,7 9 2 6 ,7 9 3 0 provided on the front nose, rear bumper, back door and upper windshield of the vehicle 7900 are, for example, 1_ It may be a device. These outside-vehicle information detection units 7920 to 7930 are mainly used to detect a preceding vehicle, a pedestrian, an obstacle, or the like.

[0253] Returning to FIG. 16 and continuing the explanation. The exterior information detection unit 7400 is

The image of the outside of the vehicle is captured by the 7410, and the captured image data is received. The vehicle exterior information detection unit 7400 receives the detection information from the vehicle exterior information detection unit 7420 connected to the vehicle exterior information detection unit 7400. When the vehicle exterior information detection unit 7420 is an ultrasonic sensor, radar device or !_ 口口装置, the vehicle exterior information detection unit 7400 transmits ultrasonic waves or electromagnetic waves and receives them. Receives the reflected wave information. The vehicle exterior information detection unit 740 may perform object detection processing or distance detection processing such as people, vehicles, obstacles, signs, or characters on the road surface based on the received information. The exterior information detection unit 7400 may perform environment recognition processing for recognizing rainfall, fog, road surface conditions, etc. based on the received information. The vehicle exterior information detection unit 7400 may calculate the distance to an object outside the vehicle based on the received information.

[0254] In addition, the exterior information detection unit 740 performs image recognition processing or distance detection processing that recognizes people, vehicles, obstacles, signs, characters on the road surface, etc. based on the received image data. You can go. The exterior information detection unit 7400 performs processing such as distortion correction or position adjustment on the received image data, and combines the image data captured by different image capturing units 7410. An overhead image or a panoramic image may be generated. The vehicle exterior information detection unit 7400 may perform viewpoint conversion processing using image data captured by different image capturing units 7410.

[0255] The in-vehicle information detection unit 750 detects in-vehicle information. In-vehicle information detection The unit 7500 is connected to, for example, a driver state detection unit 7510 that detects the state of the driver. The driver state detection unit 7510 may include a camera for capturing an image of the driver, a biometric sensor for detecting biometric information of the driver, a microphone for collecting voice in the vehicle, and the like. The biometric sensor is provided on, for example, a seat surface or a steering wheel, and detects biometric information of a passenger sitting in a seat or a driver who holds a steering wheel. The in-vehicle information detection unit 750 may calculate the degree of fatigue or concentration of the driver based on the detection information input from the driver state detection unit 750. You may decide whether you are sleeping or not. The in-vehicle information detection unit 750 may perform processing such as noise canceling processing on the collected audio signal.

[0256] The integrated control unit 760 controls overall operations in the vehicle control system 7000 according to various programs. An input unit 780 is connected to the integrated control unit 760. The input unit 780 is realized by a device such as a touch panel, a button, a microphone, a switch or a lever that can be operated by a passenger. The integrated control unit 760 may be input with data obtained by voice recognition of voice input by Microphone. The input unit 7800 may be, for example, a remote control device using infrared rays or other radio waves, or may be a mobile phone or a PDA (Personal lDigi) that supports the operation of the vehicle control system 7800. It may be an externally connected device such as ta l Assistant). The input unit 780 may be, for example, a camera, in which case the passenger can input information by gesture. Alternatively, the data obtained by detecting the movement of the wearable device worn by the passenger may be input. Further, the input unit 780 generates an input signal based on the information input by the passenger using the input unit 780 described above, and outputs the input signal to the integrated control unit 760. It may include an input control circuit for outputting. A passenger or the like operates the input unit 780 to input various data or instruct a processing operation to the vehicle control system 7000. [0257] The storage unit 7690 includes a ROM (Read Only Memory) for storing various programs executed by the microcomputer, and a RAM (Random Access Memory) for storing various parameters, calculation results, sensor values, and the like. You may stay. The storage unit 7690 may be realized by a magnetic storage device such as an HDD (Hard Disc Drive), a semiconductor storage device, an optical storage device, a magneto-optical storage device, or the like.

[0258] The general-purpose communication I/F 7620 is a general-purpose communication I/F /F that mediates communication with various devices existing in the external environment 7750. General-purpose communication I/F 7620 is compatible with GSM (registered trademark) (Global System of Mobile communications) _% W i MAX (registered trademark), LTE (registered trademark) (Long Term Evolution) or LT E— A (LTE- A cellular communication protocol such as Advanced) or a wireless LAN (also referred to as Wi-Fi (registered trademark)), or other wireless communication protocol such as Bluetooth (registered trademark) may be implemented. A general-purpose communication device/F 7620 is a device (for example, the device existing on the external network (for example, the Internet, the cloud network or the network unique to the operator)) via the base station or the access point (for example, Application server or control server). In addition, the general-purpose communication system /F 7620 uses, for example, P 2 P (Peer To Peer) technology to connect terminals (e.g., drivers, pedestrians or shops, or MTC (Machine Type Communic at ion) terminal).

[0259] The dedicated communication/F 7630 is a communication/F that supports a communication protocol designed for use in vehicles. The dedicated communication I/F 7630 is, for example, WAVE (Wi re less Access in Vehicle Environment), which is a combination of the lower layer EEE 802.1 p and the upper layer EEE 1 609, and the DSRC (Dedicated Short Range). Communications) _% or cellular communication protocols may be implemented. Dedicated communication/F 7630 is typically used for vehicle-to-vehicle communication, vehicle-to-vehicle communication, and vehicle-to-house communication. V 2 X communication, which is a concept that includes one or more of ome) communication and Vehicle to Pedestrian communication.

[0260] The positioning unit 7640 executes positioning, for example, by receiving a G NSS signal from a GNSS (Global Navigation Satellite System) satellite (for example, a G PS signal from a G PS (Global Positioning System) satellite), Generates location information including vehicle latitude, longitude and altitude. Note that the positioning unit 7640 may specify the current position by exchanging a signal with a wireless access point, or may acquire position information from a terminal having a positioning function, such as a mobile phone, PHS, or smartphone.

[0261] The beacon receiving unit 7650 receives, for example, a radio wave or an electromagnetic wave transmitted from a wireless station or the like installed on a road, and acquires information such as the current position, traffic jam, traffic closure, or required time. The function of the beacon receiving unit 7650 may be included in the above-described dedicated communication/F 7630.

[0262] The in-vehicle device/F 7660 is a communication interface that mediates a connection between the micro computer 7610 and various in-vehicle devices 7760 existing in the vehicle. The in-vehicle device I/F 7660 may establish a wireless connection using a wireless communication protocol such as a wireless LAN, Bluetooth (registered trademark), NFC (Near Field Communication), or WUSB (Wireless U SB). In addition, the in-vehicle device /F 7660 can be connected to the USB (Universal Serial Bus), HDMI (registered trademark) (High-Definition Multimedia Interface, Alternatively, a wired connection such as MH L (Mobile Hi-definition Link) may be established.The in-vehicle device 7760 is, for example, a mobile device or a wearable device that the passenger has, or an information device that is carried in or attached to the vehicle. The in-vehicle device 7760 may include a navigation device for route search to any destination.The in-vehicle device/F 7660 may be a navigation device. Exchange control signals or data signals with in-vehicle equipment 7760 [0263] The in-vehicle network/F 760 is an interface that mediates communication between the micro computer 760 and the communication network 710. The on-board network/F 760 sends and receives signals, etc. according to a predetermined protocol supported by the communication network 710.

[0264] The integrated control unit 7600's micro-computer 7600 is for general-purpose communication.

I/F 760, Dedicated communication 丨 / F 763 0, Positioning unit 760, Beacon reception unit 765, In-vehicle equipment 丨 / F 760 and vehicle network 丨 / F 7 The vehicle control system 7000 is controlled according to various programs based on the information acquired through at least one of the 680. For example, the micro computer 760 calculates the control target value of the driving force generation device, the steering mechanism or the braking device based on the acquired information on the inside and outside of the vehicle, and the drive system control unit 710. A control command may be output for 0. For example, the micro computer 760 includes ADAS (Advanced Drone) that includes vehicle collision avoidance or impact mitigation, vehicle-based follow-up driving, vehicle speed maintenance driving, vehicle collision warning, and vehicle lane departure warning. i ver Ass i stance System) may be performed for cooperative control. In addition, the micro-computer 760 controls the driving force generator, steering mechanism, braking device, etc. based on the acquired information about the surroundings of the vehicle, so that it does not depend on the driver's operation. Coordinated control may be performed for the purpose of automatically driving the vehicle.

[0265] Microcomputer 7 6 10 is for general-purpose communication / F 7 6 20, dedicated communication I / F 7 6 30, positioning unit 7 6 4 0, beacon receiving unit 7 6 5 0, in-vehicle device I / Based on the information acquired via at least one of the F 760 and in-vehicle network I / F 760, the 3D between the vehicle and the surrounding structures or objects such as people. The distance information may be generated and the local map information including the peripheral information of the current position of the vehicle may be generated. Further, the micro computer 760 may generate a warning signal by predicting a danger such as a vehicle collision, a proximity of a pedestrian or the like, or an approach to a closed road, based on the acquired information. The warning signal may be, for example, a signal for generating a warning sound or lighting a warning lamp. Yes.

[0266] The audio/video output unit 760 provides at least one of audio and image to an output device capable of visually or audibly notifying information to a passenger of the vehicle or the outside of the vehicle. Send the output signal of. In the example of FIG. 16, an audio speaker 7710, a display unit 7720, and an instrument panel 7730 are illustrated as output devices. The display unit 7720 may include at least one of an onboard display and a head-up display, for example. The display unit 7720 may have an A R (Augmented Reality) display function. In addition to these devices, the output device may be a headphone, a wearable device such as a glasses-type display worn by a passenger, a projector, or another device such as a lamp. When the output device is a display device, the display device displays the results obtained by various processes performed by the microcomputer 7610 or the information received from another control unit as text, images, tables, and graphs. Visually display in various formats such as. When the output device is an audio output device, the audio output device converts an audio signal composed of reproduced audio data or acoustic data into an analog signal and outputs it audibly.

[0267] In the example shown in Fig. 16, at least two control units connected via the communication network 710 may be integrated as one control unit. Alternatively, each control unit may be composed of multiple control units. Further, the vehicle control system 700 may include another control unit (not shown). Further, in the above description, some or all of the functions of one of the control units may be given to another control unit. That is, as long as information is transmitted and received via the communication network 710, the predetermined arithmetic processing may be performed by any one of the control units. Similarly, a sensor or device that is connected to one of the control units is connected to another control unit, and multiple control units can detect each other over the communication network 710. You may send and receive information. \\02020/174865 64 卩(: 170?2019/050965

[0268] [This technology]

The present technology may also be configured as below.

[0269] <1>

In order from the object side to the image side, a first lens unit including at least one lens group, a second lens unit including a first free-form surface lens and a second free-form surface lens, and at least one lens It consists of a third lens unit consisting of

The first lens unit and the third lens unit are composed of lenses having a shape symmetrical with respect to the optical axis and are arranged on the same optical axis,

The first free-form surface lens and the second free-form surface lens have the same shape and are arranged by rotating 180 degrees with respect to the optical axis,

The optical axes of the first lens unit and the third lens unit are axes, the axis perpendicular to the axis on the image plane is the vertical axis, and the axis perpendicular to the axis on the image plane is the X axis. Then,

The first free-form surface lens and the second free-form surface lens are movable in the axial direction,

By moving the first free-form surface lens and the second free-form surface lens in mutually opposite directions, the refracting power of the second lens unit is variable,

When the lens position changes from the wide-angle end state where the focal length is the shortest to the telephoto end state where the focal length is the longest, part of the lens groups that make up the first lens unit and the third lens unit. And the first free-form surface lens and the second free-form surface lens move in the axial direction.

Variable focal length lens system.

[0270] <2>

Satisfies the following conditional expression (1)

The variable focal length lens system according to <1>.

(1) 0 .0 3 <8 2/å <0.3 5

However, \¥02020/174865 65 卩 (: 170?2019/050965

△ 2: ø 27/¢ 2

¢ 27: Refracting power of the 2nd lens unit at the telephoto end

0: Refracting power of the second lens unit in the wide-angle end state

å: dried 1: / dried

D 1: Focal length of the entire lens system in the telephoto end state

%: Focal length of the entire lens system in the wide-angle end state

And

[0271] <3>

Satisfy the following conditional expressions (2) and (3)

The variable focal length lens system according to <2>.

However,

△ !_ Eight: Amount of movement in the vertical axis direction of the first free-form surface lens from the wide-angle end state to the telephoto end state

△ !_ _: The amount of movement of the second free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state.

D 1: Focal length of the entire lens system in the telephoto end state

And

[0272] <4>

An aperture stop is arranged near the second lens unit,

Satisfy the following conditional expression (4)

The variable focal length lens system according to <3>.

However,

△: Maximum value along the axis from the aperture stop to the second lens unit%: Focal length of the entire lens system in the wide-angle end state

And \¥02020/174865 66 卩(: 170?2019/050965

[0273] <5>

Satisfy the following conditional expression (5)

The variable focal length lens system according to <4>.

(5) 0. 9 <丨△!_8丨 / 丨△!_ 跳丨 <1.1

However,

△ !_ Eight: Amount of movement in the vertical axis direction of the first free-form surface lens from the wide-angle end state to the telephoto end state

△ !_ _: The amount of movement of the second free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state.

And

[0274] <6>

The first lens unit has, in order from the object side to the image side, a first lens group having a positive refractive power and a second lens group having a negative refractive power,

When the position of the lens changes from the wide-angle end state to the telephoto end state, the distance between the first lens group and the second lens group increases, and the second lens unit and the second lens unit are separated from each other. At least the second lens group moves in the optical axis direction so that the distance decreases.

The variable focal length lens system according to <5>.

[0275] <7>

The third lens unit includes a focusing lens that moves in the optical axis direction according to the subject distance.

The variable focal length lens system according to <6>.

[0276] <8>

A variable focal length lens system and an image sensor for converting an optical image formed by the variable focal length lens system into an electrical signal,

The variable focal length lens system,

From the object side to the image side, in order from the first side, the first lens unit is composed of at least one lens group, and the second lens unit is composed of the first and second free-form surface lenses. \¥02020/174865 67 卩(: 170?2019/050965

A lens unit and a third lens unit composed of at least one lens group,

The first lens unit and the third lens unit are composed of lenses having a shape symmetrical with respect to the optical axis and are arranged on the same optical axis,

The first free-form surface lens and the second free-form surface lens have the same shape and are arranged by rotating 180 degrees with respect to the optical axis,

The optical axes of the first lens unit and the third lens unit are axes, the axis perpendicular to the axis on the image plane is the vertical axis, and the axis perpendicular to the axis on the image plane is the X axis. Then,

The first free-form surface lens and the second free-form surface lens are movable in the axial direction,

By moving the first free-form surface lens and the second free-form surface lens in mutually opposite directions, the refracting power of the second lens unit is variable,

When the lens position changes from the wide-angle end state where the focal length is the shortest to the telephoto end state where the focal length is the longest, part of the lens groups that make up the first lens unit and the third lens unit. And the first free-form surface lens and the second free-form surface lens move in the axial direction.

Imaging device.

Explanation of symbols

[0277] 1 variable focal length lens system, 2 variable focal length lens system, 3 variable focal length lens system, II 1 1st lens unit, II 2 2nd lens unit, II 3 3rd lens unit, ◦ 1 1st lens group, ◦ 2 2nd lens group, 0 3 3rd lens group, 0 4 4th lens group, 0 5 5th lens group, 0 6 6th lens group, 0 7 7th lens group, 0 8 8th lens group,! _ 3 1st free-form surface lens, 1_ 4 2nd free-form surface lens, 3 aperture stop, 100 imaging device, 10 imaging device

Claims

\¥02020/174865 68 卩(: 17 2019/050965 Claims [Claim 1] From the object side to the image side, in order from 1 lens unit, a 2nd lens unit composed of the 1st free-form surface lens and the 2nd free-form surface lens, and a 3rd lens unit composed of at least one lens group, The first lens unit and the third lens unit are composed of lenses that are rotationally symmetric with respect to the optical axis and are arranged on the same optical axis, and the first free-form surface lens and the second free-form surface lens are included. The lenses are arranged in the same shape and rotated 180 degrees with respect to the optical axis. The optical axis of the first lens unit and the third lens unit is the axis, the axis perpendicular to the axis on the image plane is the vertical axis, and the axis perpendicular to the axis on the image plane is the X axis. Then, The first free-form surface lens and the second free-form surface lens are movable in the axial direction, By moving the first free-form surface lens and the second free-form surface lens in mutually opposite directions, the refracting power of the second lens unit is variable, and the telephoto with the longest focal length from the wide-angle end state with the shortest focal length. When the position of the lens changes to the end state, the first lens unit and the third lens unit described above are partly moved together with the first free-form surface lens. And the second free-form surface lens moves in the axial direction Variable focal length lens system. [Claim 2] The following conditional expression (1) is satisfied. The variable focal length lens system according to claim 1. (1) 0 .0 3 <8 2/å <0.3 5 However, AP 2: ¢27/¢2 \\02020/174865 69 卩(: 170?2019/050965 ¢2 7: Refractive power of the 2nd lens unit in the telephoto end state 0: Refracting power of the second lens unit in the wide-angle end state å: dried 1: / dried D 1: The focal length of the entire lens system in the telephoto end state D:%: The focal length of the entire lens system in the wide-angle end state. [Claim 3] The following conditional expression (2) and conditional expression (3) are satisfied. The variable focal length lens system according to claim 2.

However, △ !_8: Amount of movement of the first free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state △ !_ _: The amount of movement of the second free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state. D 1: The focal length of the entire lens system at the telephoto end. [Claim 4] An aperture stop is arranged near the second lens unit, Satisfies the following conditional expression (4) The variable focal length lens system according to claim 3.

However, △: Maximum length along the axis from the aperture stop to the second lens unit %: The focal length of the entire lens system in the wide-angle end state. [Claim 5] The following conditional expression (5) is satisfied. The variable focal length lens system according to claim 4. \¥02020/174865 70 卩 (: 170?2019/050965 (5) 〇.9 <丨△!_8丨 / 丨△!_ 跳丨 <1.1 However, △ !_8: Amount of movement of the first free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state △ !_ _: The amount of movement of the second free-form surface lens in the vertical axis direction from the wide-angle end state to the telephoto end state. And [Claim 6] The first lens unit has, in order from the object side to the image side, a first lens group having a positive refractive power and a second lens group having a negative refractive power, and from the wide-angle end state When the lens position state changes to the telephoto end state, the distance between the first lens group and the second lens group increases, and the distance between the second lens group and the second lens unit decreases. , At least the second lens group moves in the optical axis direction. The variable focal length lens system according to claim 5. [Claim 7] The third lens unit includes a focusing lens that moves in the optical axis direction according to the subject distance. The variable focal length lens system according to claim 6. 8. A variable focal length lens system and an image sensor for converting an optical image formed by the variable focal length lens system into an electrical signal, The variable focal length lens system, In order from the object side to the image side, a first lens unit composed of at least one lens unit, a second lens unit composed of a first free-form surface lens and a second free-form surface lens, and at least one lens unit And a third lens unit consisting of The first lens unit and the third lens unit are composed of lenses that are rotationally symmetric with respect to the optical axis and are arranged on the same optical axis, and the first free-form surface lens and the second free-form surface lens are They are arranged in the same shape and rotated 180 degrees with respect to the optical axis. \\02020/174865 71 卩(: 170?2019/050965 The optical axis of the first lens unit and the third lens unit is the axis, the axis perpendicular to the axis on the image plane is the vertical axis, and the axis perpendicular to the axis on the image plane is the X axis. Then, The first free-form surface lens and the second free-form surface lens are movable in the axial direction, By moving the first free-form surface lens and the second free-form surface lens in mutually opposite directions, the refracting power of the second lens unit is variable, and the telephoto with the longest focal length from the wide-angle end state with the shortest focal length. When the position of the lens changes to the end state, the first lens unit and the third lens unit described above are partly moved together with the first free-form surface lens. And the second free-form surface lens moves in the axial direction Imaging device.